Recent Publications

Emmott EH, Ihara Y, Tokumasu Y, Nozaki M, Saito A, Kawamoto T, Ito S, Hassan A, Brown LJ, Dennett T, Crane A, Borra C, Nesci A, Morita M, 2025. Adolescence as a key period of identity development and connectedness: A comparative autophotography study in England and Japan. Journal of Adolescent Research
doi:10.1177/07435584251349497

Nishikawa Y, Ihara Y, 2025. Exploring factors for melodic diversification of folk songs in the Ryukyu Archipelago. Evolutionary Human Sciences 7, e23.
doi:10.1017/ehs.2025.10010

Ihara Y, 2024. Models of animal coalitions and their implications for human evolution. Proceedings of the Royal Society B 291, 20241227.
doi:10.1098/rspb.2024.1227

Takahashi T, Onohara A, Ihara Y, 2023. Bayesian phylogenetic analysis of pitch-accent systems based on accentual class merger: a new method applied to Japanese dialects. Journal of Language Evolution 8, 169-191.
doi:10.1093/jole/lzae004

Morita M, Nishikawa Y, Tokumasu Y, 2024. Human musical capacity and products should have been induced by the hominin-specific combination of several biosocial features: A three-phase scheme on socio-ecological, cognitive, and cultural evolution. Evolutionary Anthropology 33, e22031.
doi:10.1002/evan.22031

Denton KK, Kendal JR, Ihara Y, Feldman MW, 2023. Cultural niche construction with application to fertility control: A model for education and social transmission of contraceptive use. Theoretical Population Biology 153, 1-14.
doi:10.1016/j.tpb.2023.06.001

Takahashi T, Ihara Y, 2023. Spatial evolution of human cultures inferred through Bayesian phylogenetic analysis. Journal of the Royal Society Interface 20, 20220543.
doi:10.1098/rsif.2022.0543

Nishikawa Y, Ihara Y, 2022. Cultural transmission of traditional songs in the Ryukyu Archipelago. PLoS ONE 17, e0270354.
doi:10.1371/journal.pone.0270354

Nojo S, Kimura R, Ihara Y, 2022. An empirical investigation on the sexual selection hypothesis of human phenotypic diversity: A test in Okinawa and Mainland Japan. Letters on Evolutionary Behavioral Science 13, 21-27.
doi:10.5178/lebs.2022.94

Takahashi T, Ihara Y, 2022. Application of a Markovian ancestral model to the temporal and spatial dynamics of cultural evolution on a population network. Theoretical Population Biology 143, 14-29.
doi:10.1016/j.tpb.2021.10.003

Kobayashi H, Kobori O, Ihara Y, Yaguchi H, Yasuda T, 2022. Understanding ostensive behavior in making inferences of referential intentions. Letters on Evolutionary Behavioral Science 13, 1-5.
doi:10.5178/lebs.2022.90

Nishikawa Y, Ishida T, 2021. Genetic lineage of the Amami islanders inferred from classical genetic markers. Meta Gene 30, 100956.
doi:10.1016/j.mgene.2021.100956

Morita M, Saito A, Nozaki M, Ihara Y, 2021. Childcare support and child social development in Japan: investigating the mediating role of parental psychological condition and parenting style. Philosophical Transactions of the Royal Society B 376, 20200025.
doi:10.1098/rstb.2020.0025

Takahashi T, Ihara Y, 2020. Quantifying the spatial pattern of dialect words spreading from a central population. Journal of the Royal Society Interface 17, 20200335.
doi:10.1098/rsif.2020.0335

Ihara Y, Ikeya K, Nobayashi A, Kaifu Y, 2020. A demographic test of accidental versus intentional island colonization by Pleistocene humans. Journal of Human Evolution 145, 102839.
doi:10.1016/j.jhevol.2020.102839

Ihara Y, 2020. A mathematical model of social selection favoring reduced aggression. Behavioral Ecology and Sociobiology 74, 91.
doi:10.1007/s00265-020-02875-4