• Iizuka, T., Mori, C., & Okanoya, K. (2023). Song-related brain auditory activity in Bengalese finches as examined by immediate early gene expressions: Comparison of arousal states and the correlational analyses between brain regions. Neurosci Res, 192, 56-62. doi:10.1016/j.neures.2023.01.014

  • Kato, A., Ohta, K., Okanoya, K., & Kazama, H. (2023). Dopaminergic neurons dynamically update sensory values during olfactory maneuver. Cell Reports

  • Kondoh, S., Fujimura, T., Nakatani, H., Muto, S., Nonaka, Y., & Okanoya, K. (2023). Experiencing respect elongates the orienting response: a pilot study. Discover Psychology, 3(1), 17. doi:10.1007/s44202-023-00075-5

  • Nakai, T., Rachman, L., Arias Sarah, P., Okanoya, K., & Aucouturier, J. J. (2023). Algorithmic voice transformations reveal the phonological basis of language-familiarity effects in cross-cultural emotion judgments. PLoS One, 18(5), e0285028. doi:10.1371/journal.pone.0285028


  • Buffenstein, R., … Okanoya, K., … Smith, ESJ. (2021). The naked truth: a comprehensive clarification and classification of current ‘myths’ in naked mole-rat biology. Biol Rev Camb Philos Soc. 2021 Sep 3. https://doi: 10.1111/brv.12791

  • Fujii, T. G., Ikebuchi, M., & Okanoya, K. (2021). Sex differences in the development and expression of a preference for familiar vocal signals in songbirds. PLoS ONE. 16(1), e0243811.

  • He, H., Boehringer, R., Huang, AJY., Overton, ETN., Polygalov, D., Okanoya, K., & McHugh, TJ. (2021). CA2 inhibition reduces the precision of hippocampal assembly reactivation. Neuron. https://doi: 10.1016/j.neuron.2021.08.034

  • Imafuku, M., Saito, A., Hosokawa, K., Okanoya, K., & Hosoda, C. (2021). Importance of Maternal Persistence in Young Children’s Persistence. Frontiers in Psychology. http://doi: 10.3389/fpsyg.2021.726583

  • Katsu, N., Yuki, S., & Okanoya, K. (2021). Production of regular rhythm induced by external stimuli in rats. Animal Cognition, 5, 1133-1141. https://doi: 10.1007/s10071-021-01505-4

  • Kondoh, S., Okanoya, K., & Tachibana, RO. (2021). Switching perception of musical meters by listening to different acoustic cues of biphasic sound stimulus. PLoS One. 2021 Aug 30;16(8):e0256712. https://doi: 10.1371/journal.pone.0256712

  • Maikusa, N., Zhu, Y., Uematsu, A., Yamashita, A., Saotome, K., Okada, N., Kasai, K., Okanoya, K., Yamashita, O., Tanaka, SC., & Koike, S. (2021). Comparison of traveling-subject and ComBat harmonization methods for assessing structural brain characteristics. Hum Brain Mapp. 2021 Nov;42(16):5278-5287. https://doi: 10.1002/hbm.25615

  • Nakamura, Y., Takahashi, M., Inoue, Y., Yanagimoto, S., Okanoya, K., & Koike, S. (2021). Nutrient infusion evoked magnetic resonance imaging signal in the human hypothalamus. Nutr Neurosci. https://doi: 10.1080/1028415X.2021.1983102

  • O’Rourke, T., Martins, P. T., Asano, R., Tachibana, R. O., Okanoya, K., & Boeckx, C. (2021). Capturing the Effects of Domestication on Vocal Learning Complexity. Trends in Cognitive Sciences, 25, 462-474.

  • Suzuki, K., Ikebuchi, M., Kagawa, H., Koike, T., & Okanoya, K. (2021). Effects of domestication on neophobia: A comparison between the domesticated Bengalese finch (Lonchura striata var. domestica) and its wild ancestor, the white-rumped munia (Lonchura striata). Behavioural Processes, 193:104502.

  • Suzuki, K., & Okanoya, K. (2021). Domestication effects on aggressiveness: Comparison of biting motivation and bite force between wild and domesticated finches. Behavioural Processes. 193:104503. https://doi: 10.1016/j.beproc.2021.104503

  • Yanagihara, S., Ikebuchi, M., Mori, C., Tachibana, R., & Okanoya, K. (2021). Neural correlates of vocal initiation in the VTA/SNc of juvenile male zebra finches. Scientific Reports, 11:22388.

  • Zhang, C., Clough, SJ., Adamah-Biassi, EB., Sveinsson, MH., Hutchinson, AJ., Miura, I., Furuse, T., Wakana, S., Matsumoto, YK., Okanoya, K., Hudson, RL., Kato, T., Dubocovich, ML., & Kasahara, T. (2021). Impact of endogenous melatonin on rhythmic behaviors, reproduction, and survival revealed in melatonin-proficient C57BL/6J congenic mice. J Pineal Res. 2021 Jun 4:e12748. https://doi: 10.1111/jpi.12748


  • Caspani, G., Fujii, T. G., Mizuhara, T., Gilman, R. T., & Okanoya, K. (2020). Biased Learning of Sexual Signals by Female Bengalese Finches. Ornithological Science, 19(1), 3-14.

  • Düring, D. N., Dittrich, F., Rocha, M. D., Tachibana, R. O., Mori, C., Okanoya, K., Boehringer, R., Ehret B., Grewe, B. F., Gerber, S., Ma, S., Rauch, M., Paterna, J.-C., Kasper, R., Gahr M., & Hahnloser, R. H. R. (2020). Fast retrograde access to projection neuron circuits underlying vocal learning in songbirds. Cell Reports, 33(6), 108364.

  • Farias-Virgens, M., Deacon, T. W., Okanoya, K., & White, S. A. (2020). Evolutionary mechanisms in the Bengalese finch’s song: Parallels and implications for the study of human speech. Proceedings of the 13th International Conference on the Evolution of Language (EvoLang13), 93-94.

  • Ikebuchi, M., Okanoya, K., & Bischof, H. J. (2020). Different Reactions of Zebra Finches and Bengalese Finches to a Three-Component Mixture of Anesthetics. Zoological science, 37(2), 159-167.

  • Inoue, Y., Waidi S., & Okanoya, K. (2020). Copulation calls in wild Mueller’s gibbons (Hylobates muelleri) : A case study. Interaction Studies, ingentaconnect, 20(2), 362-374.

  • Inoue, Y., Waidi S., Yosida, S., & Okanoya, K. (2020). Note orders suggest phrase-inserting structure in male Mueller’s gibbon songs: a case study. ACTA ECHOLOGICA, 23: 89-102.

  • Kagawa, H., Kato, Y., Suzuki, K., Kato, M., & Okanoya, K. (2020). Variation in auditory neural activation in response to strain-specific songs in wild and domesticated female Bengalese finches. Behavioural Brain Research, 395, 112840.

  • Koumura, T., & Okanoya, K. (2020). Distributed representation of discrete sequential vocalization in the Bengalese finch (Lonchura striata var. domestica). Bioacoustics, 29(3), 356-373.

  • Mizuhara, T., & Okanoya, K. (2020). Do songbirds hear songs syllable by syllable? Behavioural processes, 174, 104089.

  • Nakai, T., & Okanoya, K. (2020). Cortical collateralization induced by language and arithmetic in non-right-handers. Cortex, 124, 154-166.

  • Nakamura, Y., Okada, N., Koshiyama, D., Kamiya, K., Abe, O., Kunimatsu, A., Okanoya, K., Kasai, K., & Koike, S. (2020). Differences in functional connectivity networks related to the midbrain dopaminergic system-related area in various psychiatric disorders. Schizophrenia bulletin, 46(5), 1239-1248.

  • Nakatani, H., Nonaka, Y., Muto, S., Asano, M., Fujimura, T., Nakai, T., & Okanoya, K. (2020). Trait Respect Is Linked to Reduced Gray Matter Volume in the Anterior Temporal Lobe. Frontiers in Human Neuroscience, 14, 344.

  • Ojima, S., & Okanoya, K. (2020). Children’s Learning of a Semantics-Free Artificial Grammar with Center Embedding. Biolinguistics, 14, 21-48.

  • Okanoya, K. (2020). Evolution of vocal complexity: A peak-shift and epigenetics account. Proceedings of the 13th International Conference on the Evolution of Language (EvoLang13), 328-330.

  • Ozawa, S., Yoshimoto, H., Okanoya, K., & Hiraki, K. (2020). Pupil constrictions and their associations with increased negative affect during responses to recalled memories of interpersonal stress. Journal of Psychophysiology. 1-10.

  • Tachibana, R. O., Kanno, K., Okabe, S., Kobayasi, K. I., & Okanoya, K. (2020). USVSEG: A robust method for segmentation of ultrasonic vocalizations in rodents. PLoS ONE 15(2): e0228907.

  • Takahasi, M., Okanoya, K., & Mazuka, R. (2020). How vocal temporal parameters develop: a comparative study between humans and songbirds, two distantly related vocal learners. Journal of Language Evolution. 1-11.

  • Xu, M., Tachibana, R. O., Okanoya, K., Hagiwara, H., Hashimoto, R. I., & Homae, F. (2020). Unconscious and distinctive control of vocal pitch and timbre during altered auditory feedback. Frontiers in Psychology, 11, 1224.

  • Yanagihara, S., Ikebuchi M., Mori, C., Tachibana, R. O., & Okanoya, K. (2020). Arousal state-dependent alterations in neural activity in the zebra finch VTA/SNc Frontiers in Neuroscience 14: 897.


  • Inoue, Y., Sinun, W., & Okanoya, K. (2019).
    Copulation calls in wild Mueller’s gibbons (Hylobates muelleri).
    Interaction Studies, 20(2), 362-374. doi:10.1075/is.16018.ino
  • Katsu, N., Yamada, K., Okanoya, K., & Nakamichi, M. (2019).
    Temporal adjustment of short calls according to a partner during vocal turn-taking in Japanese macaques.
    Current Zoology, 65(1), 99-105. doi:10.1093/cz/zoy077
  • Koumura, T., & Okanoya, K. (2019).
    Distributed representation of discrete sequential vocalization in the Bengalese finch (Lonchura striata var. domestica).
    Bioacoustics. 1-18. doi:10.1080/09524622.2019.1607558
  • Kutsukake, N., Inada, M., Sakamoto, S. H., & Okanoya, K. (2019).
    Behavioural interference among eusocial naked mole rats during work.
    Journal of Ethology, 37(1), 101-109. doi:10.1007/s10164-018-0581-9
  • Nakai, T., Rachman, L., Arias, P., Okanoya, K., & Aucouturier, J.-J. (2019).
    A language-familiarity effect on the recognition of computer-transformed vocal emotional cues.
    bioRxiv, 521641, 1-9. doi:10.1101/521641
  • Nakatani, H., Muto, S., Nonaka, Y., Nakai, T., Fujimura, T., & Okanoya, K. (2019).
    Respect and admiration differentially activate the anterior temporal lobe.
    Neuroscience Research, 144, 40-47. doi:10.1016/j.neures.2018.09.003
  • Niwa, F., Kawai, M., Kanazawa, H., Okanoya, K., & Myowa-Yamakoshi, M. (2019).
    The development of the hypothalamus-pituitary-adrenal axis during infancy may be affected by antenatal glucocorticoid therapy.
    Journal of Neonatal-Perinatal Medicine, Pre-press(Pre-press), 1-7. doi:10.3233/NPM-180040
  • Okanoya, K. (2019).
    Cosmolinguistics: Necessary components for the emergence of a language-like communication system in a habitable planet.
    Astrobiology: From the Origins of Life to the Search for Extraterrestrial Intelligence, 153-166. doi:10.1007/978-981-13-3639-3_11
  • Saito, Y., Tachibana, R. O., & Okanoya, K. (2019).
    Acoustical cues for perception of emotional vocalizations in rats.
    Scientific Reports, 9(1), 10539. doi:10.1038/s41598-019-46907-0
  • Sánchez-Valpuesta, M., Suzuki, Y., Shibata, Y., Toji, N., Ji, Y., Afrin, N., Asogwa, Chinweike-Norman., Kojima, Ippei., Mizuguchi, Daisuke., Kojima, Satoshi., Okanoya, Kazuo., Okado, Haruo., Kobayashi, Kenta., Wada, K. (2019).
    Corticobasal ganglia projecting neurons are required for juvenile vocal learning but not for adult vocal plasticity in songbirds.
    Proc Natl Acad Sci U S A., 116(45), 22833-22843. doi:10.1073/pnas.1913575116
  • Tramacere, A., Wada, K., Okanoya, K., Iriki, A., & Ferrari, P. F. (2019).
    Auditory-Motor Matching in Vocal Recognition and Imitative Learning.
    Neuroscience, 409, 222-234. doi:10.1016/j.neuroscience.2019.01.056
  • Yuki, S., Nakatani, H., Nakai, T., Okanoya, K., & Tachibana, R. O. (2019).
    Regulation of action selection based on metacognition in humans via a ventral and dorsal medial prefrontal cortical network.
    Cortex, 119, 336-349. doi:10.1016/j.cortex.2019.05.001


  • Furutani, A., Mori, C., & Okanoya, K. (2018).
    Trill-calls in Java sparrows: Repetition rate determines the category of acoustically similar calls in different behavioral contexts.
    Behavioural Processes, 157, 68-72. doi:110.1016/j.beproc.2018.08.010
  • Hessler, N. A., & Okanoya, K. (2018).
    Physiological identification of cortico-striatal projection neurons for song control in Bengalese finches
    Behavioural Brain Research, Volume 349, 3 September 2018, Pages 37–41.
  • Katsu, N., Yamada, K., Okanoya, K., & Nakamichi, M. (2018).
    Temporal adjustment of short calls according to a partner during vocal turn-taking in Japanese macaques.
    Current Zoology, zoy077. doi:10.1093/cz/zoy077
  • Maeshima, H., Hosoda, C., Okanoya, K., & Nakai, T. (2018).
    Reduced γ-aminobutyric acid in the superior temporal gyrus is associated with absolute pitch.
    Neuroreport, 29(17), 1487-1491. doi:10.1097/WNR.0000000000001137
  • Matsumoto, Y. K., & Okanoya, K. (2018).
    Mice modulate ultrasonic calling bouts according to sociosexual context.
    Royal Society Open Science, 5, 180378. doi:10.1098/rsos.180378
  • Nakai, T., & Okanoya, K. (2018).
    Neural evidence of cross-domain structural interaction between language and arithmetic.
    Scientific Reports, 8(1), 12873. doi:10.1038/s41598-018-31279-8
  • Nakata, R., Kubo-Kawai, N., Okanoya, K., & Kawai, N. (2018).
    Repeated Stops for a Red Light Induced a Left-Superior Asymmetrical Brain Activity in the Near-Infrared Spectroscopy Reflecting Approach Motivation of Anger in Elderly Adults but not in Younger Adults.
    Japanese Psychological Research, 60(4), 327-336. doi:doi:10.1111/jpr.12205
  • Okanoya, K., Yosida, S., Barone, C., Applegate, D., Brittan-Powell, E., Dooling, R., & Park, T. (2018).
    Auditory-vocal coupling in the naked mole-rat, a mammal with poor auditory thresholds.
    Journal of Comparative Physiology A, 204(11), 905-914. doi:10.1007/s00359-018-1287-8
  • Tricola, G. M., Simons, M. J. P., Atema, E., Boughton, R. K., Brown, J. L., Dearborn, D. C., Divoky, G., Eimes, J. A., Huntington, C. E., Kitaysky, A. S., Juola, F. A., Lank, D. B., Litwa, H. P., Mulder, E. G. A., Nisbet, I. C. T., Okanoya, K., Safran, R. J., Schoech, S. J., Schreiber, E. A., Thompson, P. M., Verhulst, S., Wheelwright, N. T., Winkler, D. W., Young, R., Vleck, C. M., & Haussmann, M. F. (2018).
    The rate of telomere loss is related to maximum lifespan in birds.
    Philos. Trans. R. Soc. Lond., B, Biol. Sci., 373, 20160445. doi:10.1098/rstb.2016.0445


  • Beckers, G., Berwick, R., Okanoya, K., & Bolhuis, J. (2017).
    What do animals learn in artificial grammar studies?
    Neuroscience & Biobehavioral Reviews, 81(Pt B), 238-246. doi:10.1016/j.neubiorev.2016.12.021
  •  Fehér, O., Ljubičić, I., Suzuki, K., Okanoya, K., & Tchernichovski, O. (2017).
    Statistical learning in songbirds: from self-tutoring to song culture.
    Philosophical Transactions of the Royal Society B, 372(1711), 20160053. doi:10.1098/rstb.2016.0053
  • Hosoda, C., Nariai, T., Nonaka, Y., & Okanoya, K. (2017).
    Structural plasticity induced by motor learning – implication to optimize bran stimulation.
    Brain Stimulation, 10(2), 525. doi:10.1016/j.brs.2017.01.533
  • Ikebuchi, M., Okanoya, K., Hasegawa, T., & Bischof, H. (2017).
    Chick development and asynchroneous hatching in the Zebra Finch (Taeniopygia guttata castanotis).
    Zoolog. Sci., 34(5), 369-376. doi:10.2108/zs160205
  • Inoue, Y., Waidi, S., Yosida, S., & Okanoya, K. (2017).
    Combinatory rules and chunk structure in male Mueller’s gibbon songs.
    Interaction Studies, 18(1), 1-25. doi:10.1075/is.18.1.01ino
  • Kagawa, H., Seki, Y., & Okanoya, K. (2017).
    Affective valence of neurons in the vicinity of the rat amygdala: Single unit activity in response to a conditioned behavior and vocal sound playback.
    Behavioral Brain Research, 324, 109-114. doi:10.1016/j.bbr.2017.02.022
  • Katahira, K., Yuki, S., & Okanoya, K. (2017).
    Model-based estimation of subjective values using choice tasks with probabilistic feedback.
    Journal of Mathematical Psychology, 79, 29-43.
  • Nakai, T., Nakatani, H., Hosoda, C., Nonaka, Y., & Okanoya, K. (2017).
    Sense of accomplishment is modulated by a proper level of instruction and represented in the brain reward system.
    PLoS One, 12(1), e0168661. doi:10.1371/journal.pone.0168661
  • Nakatani, H., Ogawa, A., Suzuki, C., Asamizuya, T., Ueno, K., Cheng, K., & Okanoya, K. (2017).
    Perceived moral traits of others differentiate the neural activation that underlies inequity-aversion.
    Scientific Reports, 7, 43317. doi:10.1038/srep43317
  • Nixima, K., Okanoya, K., Ichinohe, N., & Kurotani, T. (2017).
    Fast voltage-sensitive dye imaging of excitatory and inhibitory synaptic transmission in the rat granular retrosplenial cortex.
    Journal of Neurophysiology, 118(3), 1784-1799. doi:10.1152/jn.00734.2016.
  • Okanoya, K. (2017).
    A long and winding road to human speech.
    Journal of the Phonetic Society of Japan, 21(1), 23-30. doi:10.24467/onseikenkyu.21.1_2
  • Okanoya, K. (2017).
    Sexual communication and domestication may give rise to the signal complexity necessary for the emergence of language: An indication from songbird studies.
    Psychonomic Bulletin & Review, 24(1), 106-110. doi:10.3758/s13423-016-1165-8
  • Okanoya, K., & Kurotani, T. (2017).
    Posterior cingulate cascading delay model for timing behavior.
    Brain Nerve, 69(11), 1223-1232. doi:10.11477/mf.1416200899
  • Oosugi, N., Kitajo, K., Hasegawa, N., Nagasaka, Y., Okanoya, K., & Fujii, N. (2017).
    A new method for quantifying the performance of EEG blind source separation algorithms by referencing a simultaneously recorded ECoG signal.
    Neural Networks, 93, 1-6. doi:10.1016/j.neunet.2017.01.005
  • Prather, J., Okanoya, K., & Bolhuis, J. (2017).
    Brains for birds and babies: Neural parallels between birdsong and speech acquisition.
    Neuroscience & Biobehavioral Reviews, 81(Pt B), 225-237. doi:10.1016/j.neubiorev.2016.12.035
  • Saito, Y., & Okanoya, K. (2017).
    Response characteristics of the rat anterior cingulate cortex to ultrasonic communicative vocalizations.
    Neuroreport, 28(9), 479-484. doi:10.1097/WNR.0000000000000781
  • Seki, Y., & Okanoya, K. (2017).
    Studies of rhythmic synchronization in avian vocal learners using operant conditioning methods.
    Behavioural Brain Research, 141(5), 3667-3668. doi:10.1121/1.4987950
  • Tachibana, R., Takahasi, M., Hessler, N., & Okanoya, K. (2017).
    Maturation-dependent control of vocal temporal plasticity in a songbird. Developmental
    Neurobiology, 77(8), 995-1006. doi:10.1002/dneu.22487
  • Tobari, Y., Sato, Y., & Okanoya, K. (2017).
    Hormonal responses to a potential mate in male birds.
    Adv Exp Med Biol., 1001, 137-149. doi:10.1007/978-981-10-3975-1_9.
  • Yuki, S., & Okanoya, K. (2017).
    Rats show adaptive choice in a metacognitive task with high uncertainty.
    Journal of Experimental Psychology: Animal Learning and Cognition, 43(1), 109-118. doi:10.1037/xan0000130


  • Fujii, T., Ikebuchi, M., & Okanoya, K. (2016).
    Auditory responses to vocal sounds in the songbird nucleus taeniae of the amygdala and the adjacent arcopallium.
    Brain, Behavior, and Evolution, 87(4), 275-289. doi: 10.1159/000447233
  • Fujimura, T., & Okanoya, K. (2016).
    Untrustworthiness inhibits congruent facial reactions to happy faces.
    Biological psychology, 121(Pt A), 30-38. doi:10.1016/j.biopsycho.2016.09.005
  • Ikkatai, Y., Okanoya, K., & Seki, Y. (2016).
    Observing real-time social interaction via telecommunication methods in budgerigars (Melopsittacus undulatus).
    Behavioral Processes, 128, 29-36. doi:10.1016/j.beproc.2016.03.020
  • Koumura, T., & Okanoya, K. (2016).
    Automatic recognition of element classes and boundaries in the birdsong with variable sequences.
    PLoS One, 11(7), e0159188. doi:10.1371/journal.pone.0159188
  • Matsumoto, Y. K., & Okanoya, K. (2016).
    Phase-specific vocalizations of male mice at the initial encounter during the courtship sequence.
    PLoS One, 11(2), e0147102. doi:10.1371/journal.pone.0147102
  • Miyawaki, S., Kawamura, Y., Oiwa, Y., Shimizu, A., Hachiya, T., Bono, H., Koya, I., Okada, Y., Kimura, T., Tsuchiya, Y., Suzuki, S., Onishi, N., Kuzumaki, N., Matsuzaki, Y., Narita, M., Ikeda, E., Okanoya, K., Seino, K., Saya, H., Okano, H., & Miura, K. (2016).
    Tumour resistance in induced pluripotent stem cells derived from naked mole-rats.
    Nature Communications, 7, 11471. doi:10.1038/ncomms11471
  • Nakai, T., & Okanoya, K. (2016).
    Individual variability in verbal fluency correlates with γ-aminobutyric acid concentration in the left inferior frontal gyrus.
    Neuroreport, 27(13), 987-991. doi:10.1097/WNR.0000000000000645
  • Ono, S., Okanoya, K., & Seki, Y. (2016).
    Hierarchical emergence of sequence sensitivity in the songbird auditory forebrain.
    Journal of Comparative Physiology A, 202(3), 163-183. doi:10.1007/s00359-016-1070-7
  • Saito, Y., Yuki, S., Seki, Y., Kagawa, H., & Okanoya, K. (2016).
    Cognitive bias in rats evoked by ultrasonic vocalizations suggests emotional contagion.
    Behavioural Processes, 132, 5-11. doi:10.1016/j.beproc.2016.08.005
  • Shiba, S., Okanoya, K., & Tachibana, R. (2016).
    Effects of background noise on acoustic characteristics of Bengalese finch songs.
    The Journal of the Acoustical Society of America, 140(6), 4039. doi:10.1121/1.4968577.
  • Yamashita, Y., Fujimura, T., Katahira, K., Honda, M., Okada, M., & Okanoya, K. (2016).
    Context sensitivity in the detection of changes in facial emotion.
    Scientific Reports, 6, 27798. doi:10.1038/srep27798


  • Arimoto, Y., & Okanoya, K. (2015).
    Multimodal features for automatic emotion estimation during face-to-face conversation.
    Journal of the Phonetic Society of Japan, 19(1), 53-65.
  • Arimoto, Y., & Okanoya, K. (2015).
    Mutual emotional understanding in a face-to-face communication environment: How speakers understand and react to listeners’ emotion in a game task dialog.
    Acoustical Science and Technology, 36(4), 370-373.
  • Katahira, K., Matsuda, Y., Fujimura, T., Ueno, K., Asamizuya, T., Suzuki, C., Cheng, K., Okanoya, K., & Okada, M. (2015).
    Neural basis of decision making guided by emotional outcomes.
    Journal of Neurophysiology, 113, 3056-3068. doi: 10.1152/jn.00564.2014.
  • Maeshima, H., Yamashita, Y., Fujimura, T., Okada, M., & Okanoya, K. (2015).
    Modulation of emotional category induced by temporal factors in emotion recognition.
    PLoS One, 10(7), e0131636. doi: 10.1371/journal.pone.0131636.
  • Mizugaki, S., Maehara, Y., Okanoya, K., & Myowa-Yamakoshi, M. (2015).
    The power of an infant’s smile: maternal physiological responses to infant emotional expressions.
    PLoS One, 10(6), e0129672. doi: 10.1371/journal.pone.0129672.
  • Okanoya, K. (2015).
    Evolution of song complexity in Bengalese finches could mirror the emergence of human language.
    Journal of Ornithology. doi:10.1007/s10336-015-1283-5.
  • Ono, S., Kagawa, H., Takahasi, M., Seki, Y., & Okanoya, K. (2015).
    Limitations of a habituation task to demonstrate discrimination of natural signals in songbirds.
    Behavioral Processes, 115, 100-108. doi: 10.1016/j.beproc.2015.03.004.
  • Sasahara, K., Tchernichovski, O., Takahasi, M., Suzuki, K., & Okanoya, K. (2015).
    A rhythm landscape approach to the developmental dynamics of birdsong.
    Journal of The Royal Society Interface, 12(112), 20150802. doi: 10.1098/rsif.2015.0802.
  • Tachibana, R., Koumura, T., & Okanoya, K. (2015).
    Variability in the temporal parameters in the song of the Bengalese finch (Lonchura striata var. domestica).
    Journal of Comparative Physiology A, 201(12), 1157-1168. doi: 10.1007/s00359-015-1046-z.


  • Hoshi-Shiba, R., Furukawa, K., & Okanoya, K. (2014).
    Neural correlates of expectation of musical termination structure or cadence.
    Neuroreport, 25, 743-748.
  • Kagawa, H., Suzuki, K., Takahasi, M., Okanoya, K. (2014)
    Domestication changes innate constraints for birdsong learning.
    Behavioural Processes, 106, 91-97.
  • Kamiyama, K., & Okanoya, K. (2014).
    Synchronized tapping facilitates learning sound sequences as indexed by the P300.
    Frontiers in Human Neuroscience, 8, e826. doi: 10.3389/fnhum.2014.00826.
  • Katahira, K., Fujimura, T., Matsuda, Y., Okanoya, K., & Okada, M. (2014).
    Individual differences in heart rate variability are associated with the avoidance of negative emotional events.
    Biological psychology, 103, 322-331. doi: 10.1016/j.biopsycho.2014.10.007.
  • Kato, M., Okanoya, K., Koike, T., Sasaki, E., Okano, H., Watanabe, S., & Iriki, A. (2014).
    Human speech- and reading-related genes display partially overlapping expression patterns in the marmoset brain.
    Brain and Language, 133, 26-38. doi: 10.1016/j.bandl.2014.03.007
  • Kawakami, A., Furukawa, K., & Okanoya, K. (2014).
    Music evokes vicarious emotions in listeners.
    Frontiers in Psychology, 30(5), e431. doi: 10.3389/fpsyg.2014.00431.
  • Koumura, T., Seki, Y., & Okanoya, K. (2014).
    Local structure sensitivity in auditory information processing in avian song nuclei.
    Neuroreport, 25(8), 562-568. doi: 10.1097/WNR.0000000000000136.
  • Matsuda, Y., Ueno, K., Cheng, K., Konishi, Y., Mazuka, R., & Okanoya, K. (2014).
    Auditory observation of infant-directed speech by mothers: experience-dependent interaction between language and emotion in the basal ganglia.
    Frontiers in Human Neuroscience, 8, e907. doi: 10.3389/fnhum.2014.00907.
  • Matsunaga, E., & Okanoya, K. (2014).
    Cadherins: potential regulators in the faculty of language.
    Current Opinion in Neurobiology, 28, 28-33. doi: 10.1016/j.conb.2014.06.001.
  • Miyagawa, S., Ojima, S., Berwick, R. C., & Okanoya, K. (2014).
    The integration hypothesis of human language evolution and the nature of contemporary languages.
    Frontiers in Psychology, 5, 564. doi: 10.3389/fpsyg.2014.00564
  • Ojima, S., & Okanoya, K. (2014).
    The non-hierarchical nature of the Chomsky hierarchy-driven artificial-grammar learning.
    Biolinguistics, 8, 163-180.
  • Okanoya, K. (2014).
    Learning, epigenetics, and computation: An extension on Fitch’s proposal: Comment on “Toward a computational framework for cognitive biology: Unifying approaches from cognitive neuroscience and comparative cognition” by W. Tecumseh Fitch
    Physics of life reviews, 11(3), 389-390. doi: 10.1016/j.plrev.2014.07.004.
  • Saito, H., Katahira, K., Okanoya, K., & Okada, M. (2014).
    Bayesian deterministic decision making: a normative account of the operant matching law and heavy-tailed reward history dependency of choices.
    Frontiers in Computational Neuroscience, 8(18), doi: 10.3389/fncom.2014.00018.
  • Seki, Y., Hessler, NA., Xie, K., Okanoya, K. (2014)
    Food rewards modulate the activity of song neurons in Bengalese finches.
    European Journal of Neuroscience, 4, 1-9. doi: 10.1111/ejn.12457.
  • Suzuki, K., Ikebuchi, M., Bischof, H., & Okanoya, K. (2014).
    Behavioral and neural trade-offs between song complexity and stress reaction in a wild and a domesticated finch strain.
    Neurosci Biobehav Rev, 46, 547-556. doi: 10.1016/j.neubiorev.2014.07.011. [review]
  • Suzuki, K., Matsunaga, E., Yamada, H., Kobayashi, T., Okanoya, K. (2014)
    Complex song development and stress hormone levels in the Bengalese finch.
    Avian Biology Research, 7 (1), 10-17.
  • Tachibana, R., Oosugi, N., & Okanoya, K. (2014).
    Semi-automatic classification of birdsong elements using a linear support vector machine.
    PLoS One, 21(9), e92584. doi: 10.1371/journal.pone.0092584.
  • Tanaka, Y., Fukushima, H., Okanoya, K., & Myowa-Yamakoshi, M. (2014).
    Mothers’ multimodal information processing is modulated by multimodal interactions with their infants.
    Scientific Reports, 4, e6623. doi: 10.1038/srep06623.
  • Yuki, S., & Okanoya, K. (2014).
    Behavioral Correlates of 50-kHz Ultrasonic Vocalizations in Rats: Progressive Operant Discrimination Learning Reduces Frequency Modulation and Increases Overall Amplitude.
    Animal Behavior and Cognition, 1(4), 452-463.
  • Yuki, S., & Okanoya, K. (2014).
    Relatively high motivation for context-evoked reward produces the magnitude effect in rats.
    Behavioral Processes, 107, 22-28. doi: 10.1016/j.beproc.2014.07.007.


  • Fuchino, Y., Naoi, N., Shibata, M., Niwa, F., Kawai, M., Konishi, Y., et al. (2013).
    Effects of preterm birth on intrinsic fluctuations in neonatal cerebral activity examined using optical imaging.
    PLoS One, 8(6), e67432.
  • Fujimura, T., Katahira, K., & Okanoya, K. (2013).
    Contextual modulation of physiological and psychological responses triggered by emotional stimuli.
    Frontiers in Psychology, 4, 212.
  • Fujimura, T., & Okanoya, K. (2013).
    Event-related potentials elicited by pre-attentive emotional changes in temporal context.
    PLoS One, 8(5), e63703.
  • Ikebuchi, M., Nanbu, S., Okanoya, K., Suzuki, R., & Bischof, H.J. (2013).
    Very early development of Nucleus Taeniae of the amygdala.
    Brain, Behavior and Evolution, 81(1), 12-26.
  • Inoue, Y., Sinun, W., Yosida, S., & Okanoya, K. (2013).
    Intergroup and intragroup antiphonal songs in wild male Mueller’s gibbons (Hylobates muelleri).
    Interaction Studies, 14(1), 24-43.
  • Kamiyama, K., Abla, D., Iwanaga, K., & Okanoya, K. (2013).
    Interaction between musical emotion and facial expression as measured by event-related potentials.
    Neuropsychologia, 51, 500-505.
  • Kashihara, K., Okanoya, K., & Kawai, N. (2013).
    Emotional attention modulates microsaccadic rate and direction.
    Psychological Research, 1-14.DOI 10.1007/s00426-013-0490-z.
  • Katahira, K., Suzuki, K., Kagawa, H., & Okanoya, K. (2013).
    A simple explanation for the evolution of complex song syntax in Bengalese finches.
    Biology Letters, 9(6), 20130842.
  • Kawai, N., Miyata, H., Nishimura, R., & Okanoya, K. (2013).
    Shadows alter facial expressions of Noh masks.
    PLoS One, 8(8), e71389.
  • Kawakami, A., Furukawa, K., Katahira, K., Kamiyama, K., & Okanoya, K. (2013).
    Relations between musical structures and perceived and felt emotions.
    Music Perception, 30(4), 407-417.
  • Kawakami, A., Furukawa, K., Katahira, K., & Okanoya, K. (2013).
    Sad music induces pleasant emotion.
    Frontiers in Psychology, 4, 311.
  • Lipkind, D., Marcus, G. F., Bemis, D. K., Sasahara, K., Jacoby, N., Takahasi, M., et al. (2013).
    Stepwise acquisition of vocal combinatorial capacity in songbirds and human infants. Nature, 498, 104-109.
  • Matsuda, Y.-T., Okanoya, K., & Myowa-Yamakoshi, M. (2013).
    Shyness in early infancy: approach-avoidance conflicts in temperament and hypersensitivity to eyes during Initial gazes to faces.
    PLoS One, 8(6), e65476.
  • Matsuda, Y., Fujimura, T., Katahira, K., Okada, M., Ueno, K., Cheng, K., et al. (2013).
    The implicit processing of categorical and dimensional strategies: an fMRI study of facial emotion perception.
    Frontiers in Human Neuroscience, 7, 551.
  • Matsunaga, E., Nambu, S., Oka, M., Okanoya, K., & Iriki, A. (2013).
    Comparative analysis of protocadherin-11 X-linked expression among postnatal rodents, non-human primates, and songbirds suggests its possible involvement in brain evolution.
    PLoS One, 8(3), e58840.
  • Miyagawa, S., Berwick, R. C., & Okanoya, K. (2013).
    The emergence of hierarchical structure in human language.
    Frontiers in Psychology, 4, 1-6.
  • Nakano, R., Nakagawa, R., Tokimoto, N., & Okanoya, K. (2013).
    Alarm call discrimination in a social rodent: adult but not juvenile degu calls induce high vigilance.
    Journal of Ethology, 31, 115-121.
  • Naoi, N., Fuchino, Y., Shibata, M., Niwa, F., Kawai, M., Konishi, Y., et al. (2013).
    Decreased right temporal activation and increased interhemispheric connectivity in response to speech in preterm infants at term-equivalent age.
    Frontiers in Psychology, 4, 94.
  • Nixima, K., Fujimori, M., & Okanoya, K. (2013).
    An ERP study of autistic traits and emotional recognition in non-clinical adolescence.
    Psychology, 4, 515-519.
  • Nixima, K., Okanoya, K., & Kurotani, T. (2013).
    Current source-density analysis of intracortical circuit in the granular retrosplenial cortex of rats: a possible role in stimulus time buffering.
    Neuroscience Research, 76, 52-57. doi:pii: S0168-0102(13)00075-8. 10.1016/j.neures.2013.02.008.
  • Seki, F., Hikishima, K., Nambu, S., Okanoya, K., Okano, H., Sasaki, E., et al. (2013).
    Multidimensional MRI-CT atlas of the naked mole-rat brain (Heterocephalus glaber).
    Frontiers in Neuroanatomy, 7, 45.
  • Seki, Y., Suzuki, K., Osawa, A. M., & Okanoya, K. (2013).
    Songbirds and humans apply different strategies in a sound sequence discrimination task.
    Frontiers in Psychology, 4, 447.
  • Shibata, M., Kawai, M., Matsukura, T., Heike, T., Okanoya, K., & Myowa-Yamakoshi, M. (2013).
    Salivary biomarkers are not suitable for pain assessment in newborns.
    Early Human Development, 89(7), 503-506.
  • Suzuki, K., Ikebuchi, M., & Okanoya, K. (2013).
    The impact of domestication on fearfulness: A comparison of tonicimmobility reactions in wild and domesticated finches.
    Behavioural Peocesses, 100, 58-63.
  • Takahasi, M., & Okanoya, K. (2013).
    An invisible sign stimulus: completion of occluded visual images in the Bengalese finch in an ecological context.
    Neuroreport, 24(7), 370-374.
  • Wada, K., Hayase, S., Imai, R., Mori, C., Kobayashi, M., Liu, W. C., et al. (2013).
    Differential androgen receptor expression and DNA methylation state in striatum song nucleus Area X between wild and domesticated songbird strains.
    European Journal of Neuroscience, 38, 2600-2610.
  • Yamashita, I., Katahira, K., Igarashi, Y., Okanoya, K., & Okada, M. (2013).
    Recurrent network for multisensory integration-identification of common sources of audiovisual stimuli.
    Frontiers in Computational Neuroscience, 7(101), doi: 10.3389/fncom.2013.00101.


  • Fujimura T, Matsuda YT, Katahira K, Okada M, Okanoya K.(2012).
    Categorical and dimensional perceptions in decoding emotional facial expressions.
    Cognition & Emotion,26,587-601.
  • Fujimura T, & Okanoya K.(2012).
    Heart rate variability predicts emotional flexibility in response to positive stimuli.
  • Fujimura, T., Sato, W., & Okanoya, K. (2012).
    Subcategories of positive emotion.
    Psychologia, 55, 1-8.
  • Hara, E., Rivas, MV., Ward, JM., Okanoya, K., & Jarvis, ED. (2012)
    Convergent differential regulation of parvalbumin in the brains of vocal learners.
    PLoS One, 7(1), e29457.
  • Kagawa, H., Takahashi, R., Ikebuchi, M., & Okanoya, K.(2012).
    Song Complexity and Auditory Feedback in Birds: a Comparison Between two Strains of Bengalese Finches with Different Degrees of Song Complexity.
    Zoological science, 29(10),645-651.
  • Kagawa, H., Yamada, H., Lin, R.-S., Mizuta, T., Hasegawa, T., & Okanoya, K.(2012).
    Ecological correlates of song complexity: a case study in white-rumped munias – the implication of relaxation of selection as a cause for signal variation in birdsong.
    Interaction Studies, 13(2), 263-284.
  • Katahira, K., Okanoya, K., & Okada, M. (2012).
    Statistical mechanics of reward-modulated learning in decision-making networks.
    Neural Computation, 24, 1230-1270.
  • Kato Y, Kato M, Okanoya K.(2012).
    Sequential information of self-produced song is represented in the auditory areas in male bengalese finches.
    Neuroreport, 23(8), 488-492.
  • Kubo, K., Okanoya, K., & Kawai, N. (2012).
    Apology isn’t good enough: an apology suppresses an approach motivation but not the physiological and psychological anger.
    PLoS One, 7(3), e33006.
  • Kutsukake, N., Teramoto, M., Homma, S., Mori, Y., Matsudaira, K., Kobayashi, H., Ishida, T., Okanoya, K & Hasegawa, T. (2012).
    Individual variation in behavioural reactions to unfamiliar conspecific vocalisation and hormonal underpinnings in male chimpanzees.
    Ethology, 118, 269-280.
  • Matsuda, YT., Okamoto, Y., Ida, M., Okanoya, K., & Myowa-Yamakoshi, M. (2012).
    Infants prefer the faces of strangers or mothers to morphed faces: an uncanny valley between social novelty and familiarity?
    Biology Letters, 8, 725-728.
  • Matsumoto, YK., Okanoya, K., & Seki, Y. (2012).
    Effects of amygdala lesions on male mouse ultrasonic vocalizations and copulatory behaviour.
    Neuroreport, 23(11), 676-680.
  • Miyata, H., Nishimura, R., Okanoya, K., & Kawai, N. (2012).
    The mysterious Noh Mask: contribution of multiple facial parts to the recognition of emotional expression.
    PLoS One, 7(11), e50280.
  • Nakagawa R, Matsunaga E, Okanoya K. (2012)
    Defects in ultrasonic vocalization of cadherin-6 knockout mice.
    PLoS One, ‘’7(11)”, e49233. doi: 10.1371/journal.pone.0049233.
  • Nakagawa, R., Matsunaga, E., Okanoya, K., & Matsushima, Y. (2012).
    Vocalizations in a Japanese wild-derived laboratory mouse KOR1: Development, behavioral contexts, and sound characteristics.
    Acoustical Science and Technlogy, 33(1), 52-55.
  • Okanoya, K. (2012).
    Behavioural factors governing song complexity in bengalese finches.
    International Journal of Comparative Psychology, 25, 44-59.
  • Secora, K. R., Peterson, J. R., Urbano, C. M., Chung, B., Okanoya, K., & Cooper, B. G. (2012).
    Syringeal specialization of frequency control during song production in the Bengalese Finch (Lonchura striata domestica).
    PLoS One, 7(3), e34135.
  • Shibata, M., Fuchino, Y., Naoi, N., Kohno, S., Kawai, M., Okanoya, K., et al. (2012).
    Broad cortical activation in response to tactile stimulation in newborns.
    Neuroreport, 23(6), 373-377.
  • Sun, F., Hoshi-Shiba, R., Abla, D., & Okanoya, K.(2012).
    Neural correlates of abstract rule learning: An event-related potential study.
    Neuropsychologia, 50, 2617-2624.
  • Suzuki, K., Yamada, H., Kobayashi, T., & Okanoya, K.(2012)
    Decreased fecal corticosterone levels due to domestication: a comparison between the white-backed munia (Lonchura striata) and its domesticated strain, the Bengalese finch (Lonchura striata var. domestica) with a suggestion for complex song evolution.
    Journal of Experimental Zoology Part A: Ecological Genetics and Physiology, 317 (9), 561-570.
  • ten Cate, C., & Okanoya, K.(2012).
    Revisiting the syntactic abilities of nonhuman animals: natural vocalizations and artificial grammar learning.
    Philosophical Transactions of the Royal Society B,367, 1984-1994.
  • Yamazaki, Y., Suzuki, K., Inada, M., Iriki, A., & Okanoya, K.(2012).
    Sequential learning and rule abstraction in Bengalese finches.
    Animal Cognition, 15(3), 369-377.
  • Yosida, S., & Okanoya, K. (2012).
    Bilateral lesions of the medial frontal cortex disrupt recognition of social hierarchy during antiphonal communication in naked mole-rats (Heterocephalus glaber).
    Journal of Comparative Physiology A, 198, 109-117.


  • Aucouturier, J.-J., Nonaka, Y., Katahira, K., & Okanoya, K. (2011).
    Segmentation of expiratory and inspiratory sounds in baby cry audio recordings using Hidden Markov Models.
    Journal of the Acoustical Society of America,130(5),2969-2977.
  • Berwick, R. C., Okanoya, K., Beckers, G. J. L., & Bolhuis, J. J. (2011).
    Songs to syntax: the linguistics of birdsong.
    Trends in Cognitive Sciences, 15(3), 113-121.
  • Hara, K., Katahira, K., Okanoya, K., & Okada, M.(2011).
    Statistical mechanics of on-line node-perturbation learning.
    IPSJ Transactions on Mathematical Modeling and Its Applications, 4, 72-81.
  • Hasegawa, A., Okanoya, K., Hasegawa, T. & Seki, Y. (2011).
    Rhythmic synchronization tapping to an audio-visual metronome in budgerigars.
    Scientific Reports, 1, 120. DOI:10.1038/srep00120
  • Katahira, K., Fujimura, T., Okanoya, K., & Okada, M. (2011).
    Decision making based on emotional images.
    Frontiers in Emotion Science, 2, 311.
  • Katahira, K., Okanoya, K., & Okada, M. (2011).
    Effects of synaptic weight diffusion on learning in decision making netwroks.
    Advances in Neural Information Processing Systems, 23, 1081-1089.
  • Katahira, K., Suzuki, K., Okanoya, K., & Okada, M. (2011).
    Complex sequencing rules of birdsong can be explained by simple hidden markov processes.
    PLoS ONE, 6(9), e24516. doi:10.1371/journal.pone.0024516
  • Kudo, N., Nonaka, Y., Mizuno, N., Mizuno, K., & Okanoya, K.(2011).
    On-line statistical segmentation of a non-speech auditory stream in neonates as demonstrated by event-related brain potentials.
    Developmental Science, 14, 1100-1106.
  • Matsunaga, E., Kurotani, T., Suzuki, K., & Okanoya, K.(2011).
    Type-II cadherins modulate neural activity in cultured rat hippocampal neurons.
    Neuroreport, 22, 629-632.
  • Matsunaga, E., Nambu, S., Iriki, A., & Okanoya, K.(2011).
    Expression pattern of cadherins in Naked mole rat (Heterocephalus glaber) suggests innate cortical diversification of the cerebrum.
    Journal of Comparative Neurology, 519, 1736-1747.
  • Matsunaga, E., & Okanoya, K.(2011).
    Comparative gene expression analysis among vocal learners (bengalese finch and budgerigar) and non-learners (quail and ring dove) reveals variable cadherin expressions in the vocal system.
    Frontiers in neuroanatomy, 5, 28.
  • Matsunaga, E., Suzuki, K., Kobayashi, T., & Okanoya, K. (2011).
    Comparative analysis of mineralocorticoid receptor expression among vocal learners (Bengalese finch and budgerigar) and non-vocal learners (quail and ring dove) has implications for the evolution of avian vocal learning.
    Development, Growth & Differentiation, 53, 961-970.
  • Matsunaga, E., Suzuki, K., Kato, S, Kurotani, T., Kobayashi, K., & Okanoya, K. (2011).
    Dynamic expression of cadherins regulates vocal development in a songbird
    PLoS ONE,6(9), e25272.
  • Saito H., Katahira. K., OKanoya, K., & Okada, M.(2011).
    Statistical mechanics of structural and temporal credit assignment effects on learning in neural networks.
    Physical Review E, 83, 051125.
  • Suzuki K, Matsunaga E, Kobayashi T, Okanoya K.(2011).
    Expression patterns of mineralocorticoid and glucocorticoid receptors in Bengalese finch (Lonchura striata var. domestica) brain suggest a relationship between stress hormones and song-system development.
    Neuroscience,194, 72-83.
  • Tobari Y, Iijima N, Tsunekawa K, Osugi T, Haraguchi S, Ubuka T, Ukena K, Okanoya K, Tsutsui K, Ozawa H. (2011).
    Identification, localisation and functional implication of 26RFa orthologue peptide in the brain of Zebra Finch (Taeniopygia guttata).
    Journal of Neuroendocrinology, 23,791-803.
  • Tobari, Y., Okumura, T., Tani, J., & Okanoya, K. (2011).
    A direct neuronal connection between the telencephalic nucleus robustus arcopallialis and the nucleus nervi hypoglossi, pars tracheosyringealis in Bengalese finches (Lonchura striata var. domestica) .
    Neuroscience Research,71, 361-368.
  • Yamashita, Y., Okumura, T., Okanoya, K., & Tani, J. (2011).
    Cooperation of deterministic dynamics and random noise in production of complex syntactical avian song sequences: a neural network model.
    Frontiers in computational neuroscience, 5, 18.
  • Kikusui, T., Nakanishi, K., Nakagawa, R., Nagasawa, M., Mogi, K., & Okanoya, K.(2011).
    Cross fostering experiments suggest that mice songs are innate.
    PLoS ONE, 6(3), e17721.
  • Uekita, T., & Okanoya, K.(2011).
    Hippocampus lesions induced deficits in social and spatial recognition in Octodon degus.
    Behavioral Brain Research, 219, 302-309.


  • Bolhuis, J., Okanoya, K., & Scharff, C. (2010).
    Twitter evolution: converging mechanisms in birdsong and human speech.
    Nature Reviews Neuroscience, 11, 747-759.
  • Kamiyama, K., Katahira, K., Abla, D., Hori, K., & Okanoya, K. (2010).
    Music playing and memory trace: Evidence from event-related potentials.
    Neuroscience Research, 67, 334-340.
  • Katahira, K., Nishikawa, J., Okanoya, K., & Okada, M. (2010).
    Extracting state transition dynamics from multiple spike trains using Hidden Markov Models with correlated poisson distribution.
    Neural Computation, 22, 2369-2389.
  • Katahira, K., Cho, T., Okanoya, K., & Okada, M. (2010).
    Optimal node perturbation in linear perceptrons with uncertain eligibility trace.
    Neural Networks, 23, 219-225.
  • Kato, M & Okanoya, K. (2010).
    Molecular characterization of the song control nucleus HVC in Bengalese finch brain.
    Brain Research, 1360. 56-76.
  • Kato, Y., Hasegawa, T., & Okanoya, K. (2010).
    Song preference of female Bengalese finches as measured by operant conditioning.
    Journal of Ethology, 28. 447-453.
  • Kato, Y., Kato, M., Hasegawa, T., & Okanoya, K. (2010).
    Song memory in female birds: neuronal activation suggests phonological cording.
    NeuroReport?, 21. 404-409.
  • Katsushima, K., Nishida, C., Yosida, S., Kato, M., Okanoya, K., & Matsuda, Y. (2010).
    A multiplex PCR assay for molecular sexing of the naked mole-rat (Heterocephalus glaber).
    Molecular Ecology Resources, 10, 222-224.
  • Suge, R., & Okanoya, K. (2010).
    Perceptual chunking in the self-produced songs of Bengalese finches (Lonchura striata var. domestica).
    Animal Cognition, 13, 515-523.
  • Takahasi, M. & Okanoya, K. (2010).
    Song learning in wild and domesticated strains of White-rumped Munia, Lonchura striata, compared by cross-fostering procedures: domestication increases song variability by decreasing strain-specific bias.
    Ethology, 116, 396-405.
  • Takahasi, M., Yamada, H. & Okanoya, K. (2010).
    Statistical and prosodic cues for song segmentation learning by Bengalese Finches (Lonchura striata var. domestica).
    Ethology, 116, 481-489.
  • Tobari, Y., Iijima, N., Tsunekawa, K., Osugi, T., Okanoya, K., Tsutsui, K. & Ozawa, H. (2010).
    Identification of gonadotropin-inhibitory hormone in the zebra finch (Taeniopygia guttata): peptide isolation, cDNA cloning and brain distribution.
    Peptides, 31, 816-826.
  • Umeda, T., Takashima, N., Nakagawa, R., Maekawa, M., Ikegami, S., Yoshikawa, T., Kobayashi, K., Okanoya, K., Inokuchi, K., & Osumi, N. (2010).
    Evaluation of Pax6 mutant rat as a model for autism.
    PLoS One, 5, e15500-15501-e15500-15510.
  • Yamazaki, Y., Yokochi, H., Tanaka, M., Okanoya, K., & Iriki, A. (2010).
    Potential role of monkey inferior parietal neurons coding action semantic equivalences as precursors of parts of speech.
    Social Neuroscience, 5, 105-117.


  • Abla, D., & Okanoya, K. (2009).
    Visual statistical learning of shape sequences: An ERP study.
    Neuroscience Research, 64, 185-190.
  • *Kakishita, Y., *Sasahara, K., Nishino, T,, Takahasi, M., & Okanoya, K. (2009).
    Ethological Data Mining: An Automata-based Approach to Extract Behavioral Units and Rules.
    Data Mining and Knowledge Discovery, 18, 446-471.(*equal contribution)
  • Matsunaga, E., & Okanoya, K. (2009).
    Vocal control area-related expression of neuropilin-1, plexin-A4, and the ligand semaphorin-3A has implications for the evolution of the avian vocal system.
    Development, Growth & Differentiation, 51, 45-54.
  • Matsunaga, E. & Okanoya, K. (2009)
    Evolution and diversity in avian vocal system; An Evo-Devo model from the morphological and behavioral perspectives.
    Development, Growth & Differentiation, 51, 355-367.
  • Morisaka, T., & Okanoya, K. (2009).
    Cognitive tactics of Bengalese finch (Lonchura striata var. domestica) for song discrimination in a go/no-go operant task.
    Journal of Ethology, 27, 11-18.
  • Seki, Y., & Okanoya, K. (2009).
    The effect of sound location in a song discrimination task in Bengalese finches (Lonchura striata var. domestica).
    Journal of Ethology, 27, 407-411.
  • Soma, M., Hiraiwa-Hasegawa, M., & Okanoya, K. (2009).
    Early ontogenetic effects on song quality in the Bengalese finch (Lonchura striata var. domestica): laying order, sibling competition and song syntax.
    Behavioral Ecology and Sociobiology, 63, 363-370.
  • Soma, M., Hiraiwa-Hasegawa, M., & Okanoya, K. (2009).
    Song-learning strategies in the Bengalese finch: do chicks choose tutors based on song complexity?
    Animal Behaviour, 78, 1107-1113.
  • Yosida, S., & Okanoya, K. (2009).
    Naked mole-rat is sensitive to social hierarchy encoded in antiphonal vocalization.
    Ethology, 115, 823-831.


  • Abla D., & Okanoya K. (2008)
    Statistical segmentation of tone sequences activates the left inferior frontal cortex: a near-infrared spectroscopy study.
    Neuropsychologia, Vol. 46, pp. 2787-2795.
  • Abla D., Katahira K., and Okanoya K. (2008)
    Online assessment of statistical learning by event-related potentials.
    Journal of Cognitive Neuroscience, Vol. 20, No. 6, pp. 952-964.
  • Katahira K., Abla D., Masuda S. & Okanoya K. (2008)
    Feedback-based error monitoring processes during musical performance: An ERP study.
    Neuroscience Research, Vol. 61, pp. 120-128.
  • Matsunaga, E., & Okanoya, K. (2008).
    Expression analysis of cadherins in the songbird brain: relationship to vocal system development.
    Journal of Comparative Neurology, 508, 329-342.
  • Matsunaga, E. & Okanoya, K. (2008)
    Vocal area-related expression of the androgen receptor in the budgerigar (Melopsittacus undulatus) brain.
    Brain research, Vol. 1208, pp. 87-94.
  • Morisaka T., Katahira K., & Okanoya K. (2008)
    Variability in preference for conspecific songs with syntactical complexity in female Bengalese finches: towards an understanding of song evolution.
    Ornithological Science, Vol. 7, pp. 75-84.
  • Nishikawa J., Okada M., & Okanoya K. (2008)
    Population coding of song element sequence in the Bengalese finch HVC.
    European Journal of Neuroscience, Vol. 27, No. 12, pp. 3273-3283.
  • Okanoya K., Tokimoto N, Kumazawa N., Hihara S., Iriki A. (2008)
    Tool-use training in species of rodent: the emergence of an optimal motor strategy and functional understanding.
    PLoS One, Vol. 3, pp. e1860-1 – e1860-8.
  • Seki Y. & Okanoya K. (2008)
    Functional evidence for internal feedback in the songbird brain nucleus HVC.
    Neuroreport, Vol. 19, pp. 679-682.
  • Seki, Y., & Okanoya, K. (2008).
    Sex differences in audiovisual discrimination learning by Bengalese finches (Lonchura striata var. domestica).
    Journal of Comparative Psychology, 122, 26-34.
  • Seki, Y., Suzuki, K., Takahasi, M., & Okanoya, K. (2008).
    Song motor control organizes acoustic patterns on two levels in Bengalese finches (Lonchura striata var. domestica).
    Journal of Comparative Physiology A‘, 194, 533-543.
  • Soma, M., Hasegawa, T. & Okanoya, K. (2008)
    Genetic and developmental effects, and morphological influences on the acoustic structure of individual distance calls in female Bengalese finches Lonchura striata var. domestica.
    Journal of Avian Biology, Vol. 39, pp. 101-107.


  • Fujii, N., Abla, D., Kudo, N., Hihara, S., Okanoya, K. & Iriki, A.(2007)
    Prefrontal activity during koh-do incense discrimination.
    Neuroscience Research 59 pp.257-264.
  • Katahira, K., Okanoya, K., & Okada, M. (2007).
    A neural network model for generating complex birdsong syntax.
    Biological Cybernetics, 97, 441-448.
  • Katahira, K., Kawamura, M., Okanoya, K., & Okada, M. (2007).
    Retrieval of branching sequences in an associative memory model with common external input and bias input.
    Journal of the Physical Society of Japan, 76, 044804.
  • Okumura, T., Okanoya, K., and Tani, J. (2007)
    Application of light-cured dental adhesive resin for mounting electrodes or microdialysis probes in chronic experiments.
    Journal of Visualized Experiments, 6, 249.
  • Okanoya K. (2007)
    Language evolution and an emergent property.
    Current Opinion in Neurobiology 17: 271-276.
  • Soma, M., Saito, D. S., Hasegawa, T. & Okanoya, K. (2007)
    Sex-specific maternal effect on egg mass, laying order, and sibling competition in the Bengalese finch (Lonchura striata var. domestica).
    Behavioral Ecology and Sociobiology, 61, 1695-1705.
  • Yosida S. Kobayasi KI. Ikebuchi M. Ozaki R. and Okanoya K.(2007)
    Antiphonal vocalization of a subterranean rodent, the Naked Mole-Rat(Heterocephalus glaber)
    Ethology, 113, 703-710.


  • Ikebuchi, M., & Okanoya, K. (2006).
    Growth of pair bonding in Zebra Finches: physical and social factors.
    Ornithological Science, 5, 65-75.
  • Nishikawa J. and Okanoya K. (2006)
    Dynamical neural representation of song syntax in Bengalese Finch: a model study.
    Ornithological Science 5: 95-103.
  • Seki, Y., Okanoya. K. (2006)
    Effects of visual stimulation on the auditory responses of the HVc song control nucleus in anesthetized Bengalese Finches.
    Ornithological Science 5: 39-46.
  • Soma, M., Takahasi, M., Hasegawa, T. & Okanoya, K. (2006).
    Trade-offs and correlations among multiple song traits in Bengalese finches.
    Ornithological Science 5: 77-84.
  • Soma, M., Takahasi, M., Ikebuchi, M., Yamada, H., Suzuki, M., Hasegawa, T. & Okanoya, K. (2006)
    Early rearing conditions affect the development of body size and song in Bengalese finches.
    Ethology 112: 1071-1078.
  • Takahasi M., Kagawa H., Ikebuchi M. and Okanoya K. (2006)
    Case studies of song and call learning by a hybrid Bengalese-Zebra Finch and Bengalese-fostered Zebra Finches: Assessing innate factors in vocal learning.
    Ornithological Science 5: 85-94.
  • Tobari Y., Okumura T., Tani J. and Okanoya K.(2006)
    Non-singing female Bengalese finches (Lonchura striata var. domestica) possess neuronal projections connecting a song learning region to a song motor region.
    Ornithological Science 5: 47-55.


  • Takahasi, M., Ikebuchi, M., & Okanoya, K. (2005).
    Spatiotemporal properties of visual stimuli for song induction in Bengalese finches.
    Neuroreport, 16, 1339-1343.
  • Tobari, Y., Nakamura, K.Z., & Okanoya, K. (2005).
    Sex differences in the telencephalic song control circuitry in Bengalese finches(Lonchura striata var. domestica).
    Zoological Science, 22, 1089-1094.
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