Masahito MORITA's Website
Masahito MORITA, PhD
Assistant Professor (the official title in the university: Research Associate)
Department of Health Sciences of Mind and Body, Faculty of Human Sciences, University of Human Arts and Sciences →
Evolutionary Anthropology Lab (Yasuo Ihara's Lab) →, Department of Biological Sciences → , Graduate School of Science →, The University of Tokyo →, Japan
E-mail: mmorita.human "at" gmail.com (primary), or masmorita "at" bs.s.u-tokyo.ac.jp
Postal address: 1288 Magome, Iwatsuki-ku, Saitama-shi, Saitama 339-8539, Japan
Tel: +81-48-749-6111; Fax: +81-48-749-6110
The biology of human behavior, including evolutionary and sociocultural aspects
Human behavioral ecology, evolutionary demography, human ethology, and anthropology
Evolutionary approaches to fertility decline and other (mal)adaptive behaviors
Evolutionary studies of human behavior and the sociobiology debate
National birth cohort survey on child health, child development, and family wellbeing →
Evolutionary and ecological studies on human language (Evolinguistics) →
Adolescent sociality, communication, cultural transmission, and metacognition →→
Symposium "ALE <Adolescence X Language Evolution>" in Tokyo 2019 →
2016: PhD (5-year course) in the Department of Evolutionary Studies of Biosystems →, School of Advanced Sciences →, SOKENDAI (The Graduate University for Advanced Studies) →, Japan
Supervisors: Dr. Mariko Hiraiwa-Hasegawa →→→, Dr. Hisashi Ohtsuki →→→, and Dr. Kaori Iida →→; Hasegawa & Kutsukake Research Group
2011: BSc in the Department of Biology →, Faculty of Science →, Osaka City University →, Japan
Supervisor: Dr. Masanori Kohda →; Laboratory of Animal Sociology
2022.4 – present: Assistant Professor (the official title in the university: Research Associate) in the Faculty of Human Sciences, University of Human Arts and Sciences →
2018.4 – 2022.3: Postdoctoral Researcher (the official title in the university: Project Researcher) in the School of Science, The University of Tokyo →
2016.4 – 2018.3: Postdoctoral Researcher (the official title in the university: Researcher) in the Graduate School of Medicine, Kyoto University →→
2013.4 – 2016.3: Research Fellow of the Japan Society for the Promotion of Science (DC1) →
2012.6 – 2013.3: Research Assistant in the School of Advanced Sciences, SOKENDAI →
2011.6 – 2012.3: Research Assistant in the School of Advanced Sciences, SOKENDAI →
Google Scholar Citations →
11. 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: Biological Sciences, 376(1827): 20200025. → (https://doi.org/10.1098/rstb.2020.0025)
10. Morita, M. (2019)
Behaviours of dyads sitting outside in New York's Times Square: exploratory observation using webcam videos
Journal of Human Ergology, 48(2): 69–81. → (https://doi.org/10.11183/jhe.48_2.69)
9. Morita, M. (2019)
Human behavioral ecology
In: Schackelford, T. K. & Weekes-Shackelford, V. A. (Eds.) Encyclopedia of Evolutionary Psychological Science, Springer, Cham. → Living Edition: 4 pp. → (https://doi.org/10.1007/978-3-319-16999-6_1380-1)
8. Morita, M. (2018)
Demographic studies enhance the understanding of evolutionarily (mal)adaptive behaviors and phenomena in humans: a review on fertility decline and an integrated model
Population Ecology, 60(1–2): 143–154. → (https://doi.org/10.1007/s10144-017-0597-y)
7. Morita, M., Go, T., Hirabayashi, K., Heike, T. & Japan Environment and Children's Study (JECS) Group (2017)
Parental condition and infant sex at birth in the Japan Environment and Children's Study: a test of the Trivers–Willard hypothesis
Letters on Evolutionary Behavioral Science, 8(2): 40–44. → (https://doi.org/10.5178/lebs.2017.63)
6. Morita, M. (2017)
An evolutionary perspective on child sciences: towards interdisciplinary studies [in Japanese]
Child Science, 13: 33–36. →
5. Morita, M. (2016)
The relationship between evolutionary studies of human behavior and society: with reference to the sociobiology debate [in Japanese with an English abstract]
Japanese Journal of Ecology, 66(3): 549–560. → (https://doi.org/10.18960/seitai.66.3_549)
4. Morita, M., Ohtsuki, H. & Hiraiwa-Hasegawa, M. (2016b)
Does sexual conflict between mother and father lead to fertility decline? A questionnaire survey in a modern developed society
Human Nature, 27(2): 201–219. → (https://doi.org/10.1007/s12110-016-9254-y)
3. Morita, M., Ohtsuki, H. & Hiraiwa-Hasegawa, M. (2016a)
A panel data analysis of the probability of childbirth in a Japanese sample: new evidence of the two-child norm
American Journal of Human Biology, 28(2): 220–225. → (https://doi.org/10.1002/ajhb.22776)
2. Morita, M., Ohtsuki, H., Sasaki, A. & Hiraiwa-Hasegawa, M. (2012)
Factors affecting the number of children in five developed countries: a statistical analysis with an evolutionary perspective
Letters on Evolutionary Behavioral Science, 3(1): 7–11. → (https://doi.org/10.5178/lebs.2012.19)
1. Morita, M. (2011)
Sex differences in human greeting behaviors in waiting and meeting situations: a field study in Japan
Journal of Human Ergology, 40(1–2): 79–83. → (https://doi.org/10.11183/jhe.40.79)
Other publications (without review; regardless of article type)
7. Morita, M. (2022)
Evolution of human behaviour and mind: including a perspective of the mind-body correlation and my self-introduction [in Japanese]
Human Arts and Sciences, 42: 3–5.
6. "Adolescent Sociality Across Cultures" Project (2021)
What does adolescence look like for teenagers in England and Japan?
Futurum Careers article → (https://doi.org/10.33424/FUTURUM204)
5. Morita, M. (2021)
Raise children [in Japanese]
In: Oda, R., Hashiya, K., Ohtsubo, Y. & Hiraishi, K. (Eds.) Encyclopedia of Evolutionary Understanding of Human Behavior: 152–157. Asakura Publishing. →
4. Morita, M. (2020)
Book review "Different Animals, Different Solutions: Comparative Views on Animal Parenting" Saito, A., Hiraishi, K. & Kuze, N. (Eds.) [in Japanese]
Anthropological Science (Japanese Series), 128(1): 41–43. → (https://doi.org/10.1537/asj.20br02)
3. Morita, M., Iwasawa, M. & Kaneko R. (2018)
An evolutionary and ecological study on marriage and fertility decline: socioeconomic success and reproductive success [in Japanese]
JSPS Grant-in-Aid for Scientific Research (Grant Number: 25245061) Project Report, 117–119. →
2. Morita, M. & Kaneko R. (2017)
Analyses on marriage towards understandings of fertility decline: the relationship between socioeconomic success and reproductive success (a preliminary report) [in Japanese]
JSPS Grant-in-Aid for Scientific Research (Grant Number: 26285128) Project Report, 161–174. →
1. Morita, M. (2016)
Understanding human nature: a personal perspective [in Japanese]
Anthropological Letters, 5(2): 23–25.
12. ○Morita, M., Saito, A., Nozaki, M. & Ihara, Y.
Parental psychological condition and parenting behaviour mediate the associations between childcare support and child social development in Japan
The 16th European Human Behaviour and Evolution Association conference (EHBEA 2021 DIGITAL) →
Online, 24–27 March, 2021, Poster →
X. ○Morita, M., Emmott, E., Brown, L., Hassan, A., Ihara, Y., Tokumasu, Y., Nozaki, M., Saito, A., Kawamoto, T. & Ito, S.
Photovoice as an ethological method in the "private world" of teenagers in England and Japan
The 15th European Human Behaviour and Evolution Association conference →
Jagiellonian University, Kraków, Poland, 1–4 April, 2020, Poster →
*The conference was cancelled due to the outbreak of the coronavirus disease (COVID-19).
X. ○Emmott, E. & ○Morita, M.
Understanding adolescent sociality: photovoice as an ethological method
The 15th European Human Behaviour and Evolution Association conference → Workshop/Symposium "Evolutionary Approaches to Adolescence" → Organizers: Emily Emmott & Masahito Morita
Jagiellonian University, Kraków, Poland, 1 April, 2020, Oral →
*The conference has been cancelled due to the outbreak of the coronavirus disease (COVID-19).
11. ○Morita, M.
Exploring socioecological foundations for the evolution of language: observation of communication in a natural setting using webcam videos
The 14th European Human Behaviour and Evolution Association conference →
Toulouse 1 University Capitole, France, 23–26 April, 2019, Poster →
10. ○Morita, M., Ohtsuki, H. & Hiraiwa-Hasegawa, M.
Evolutionary approaches to human demography: case studies on fertility decline →
The 32nd annual meeting of the Society of Population Ecology → Plenary Symposium "Evolutionary demography: the dynamic and broad intersection of ecology and evolution" Organizers: Takenori Takada & Richard Shefferson
Shika-no-yu Hotel in Jozankei, Sapporo, Hokkaido, Japan, 3–5 November, 2016, Oral [S-14]
9. ○Morita, M., Ohtsuki, H. & Hiraiwa-Hasegawa, M.
Socioeconomic success vs. reproductive success: an evolutionary approach to fertility decline in modern competitive societies
Economics and Biology of Contests conference →
Queensland University of Technology, Brisbane, Australia, 27–28 February, 2016, Oral →
8. ○Morita, M., Ohtsuki, H., Kokko, H. & Hiraiwa-Hasegawa, M.
Maximization of "Happiness" (= biological fitness and self-enhancement): a mathematical model of fertility decline in humans
The 8th annual meeting of the Human Behavior and Evolution Society of Japan →
SOKENDAI, Hayama, Kanagawa, Japan, 5–6 December, 2015, Poster [P26] →
7. ○Morita, M., Ohtsuki, H. & Hiraiwa-Hasegawa, M.
Fertility decline in Japan: effects of socioeconomic status and sexual conflict
The 3rd annual meeting of the Evolutionary Demography Society →
Conference Centre De Werelt, Lunteren, The Netherlands, 5–7 October, 2015, Lightning Talk & Poster →
6. ○Morita, M., Ohtsuki, H. & Hiraiwa-Hasegawa, M.
Evolutionary biology of fertility decline in humans: case studies in Japan
Biology15 (the joint meeting of Swiss societies on organismic biology) →
Eawag, Dübendorf, Switzerland, 12–13 February, 2015, Poster  →
5. ○Morita, M., Ohtsuki, H. & Hiraiwa-Hasegawa, M.
Mothers desire a smaller number of children than fathers? Sexual conflict over fertility in modern society
The 22nd biennial international conference on Human Ethology →
Federal University of Pará, Belém, Brazil, 5–9 August, 2014, Poster  →
4. ○Morita, M., Ohtsuki, H. & Hiraiwa-Hasegawa, M.
The presence of two children prevents further childbirth? A statistical analysis of Japanese panel data
The 26th annual meeting of the Human Behavior and Evolution Society →
Praiamar Natal Hotel & Convention, Natal, Brazil, 30 July – 2 August, 2014, Oral →
3. ○Morita, M., Ohtsuki, H. & Hiraiwa-Hasegawa, M.
Does sexual conflict between parents lead to fertility decline? A questionnaire survey in Japan
Cooperation and Conflict in the Family conference →
The University of New South Wales, Sydney, Australia, 2–5 February, 2014, Oral →
2. ○Morita, M., Ohtsuki, H. & Hiraiwa-Hasegawa, M.
When to have babies: a panel data analysis of childbirth in Japan with evolutionary perspectives
The 8th European Human Behaviour and Evolution Association conference →
VU University Amsterdam, The Netherlands, 24–27 March, 2013, Poster  →
1. ○Morita, M., Ohtsuki, H., Sasaki, A. & Hiraiwa-Hasegawa, M.
Factors affecting the number of children in five developed countries: a statistical analysis with an evolutionary perspective
The 24th annual meeting of the Human Behavior and Evolution Society →
The University of New Mexico in Albuquerque, USA, 13–17 June, 2012, Poster  →
PhD Thesis (for Doctor of Philosophy)
Evolutionary approaches to fertility decline in humans: case studies in Japan →→
X. Declined (2022–2024): Overseas Research Fellowships of the Japan Society for the Promotion of Science →
"The integrated understanding of evolutionarily (mal)adaptive behaviours and phenomena in humans"
Host Researcher: Dr. Rebecca Sear at the London School of Hygiene and Tropical Medicine →
2. 2018/19–2021 (18 months + extension due to COVID): ESRC-AHRC UK-Japan Connections Grant →
"Adolescent sociality across cultures: establishing a Japan-UK collaboration" →→→
49,825 GBP in total (Co-PI with Dr. Emily Emmott at the University College London →)
1. 2013–2016 (36 months): Grant-in-Aid for JSPS (Japan Society for the Promotion of Science) Fellows (JSPS KAKENHI Grant Number: 13J04635)
"Evolutionary approaches to fertility decline and human reproductive strategies"
3,000,000 JPY in total (PI)
Letters on Evolutionary Behavioral Science →, Copy Editor (2016.2 – 2021.3)
Reviewer: Annals of Nursing and Practice; Behavioral Ecology and Sociobiology; Behavioral Sciences; Evolution and Human Behavior; Evolutionary Human Sciences; Frontiers in Psychology (2); Frontiers in Reproductive Health (5); International Journal of Environmental Research and Public Health; Joint Conference on Language Evolution; Journal of Biosocial Science; Matrix: A Journal for Matricultural Studies; New Ideas in Psychology; Population Ecology; Social Sciences
The SOKENDAI Research Award (September, 2016) →