The Tokyo Foundation for Policy Research


The Tokyo Foundation for Policy Research


藤澤 啓子/Keiko Fujisawa


Keiko Fujisawa

Last updated : October 04, 2023

Professor, Faculty of Letters, Keio University

Areas of Expertise
  • Developmental psychology
  • childcare environment

After graduating from the Faculty of Education, University of Tokyo, I completed the doctoral course at the university’s Graduate School of Arts and Sciences, working as a research fellow (DC1) at the Japan Society for the Promotion of Science during the doctoral course. I became an assistant professor in the Faculty of Letters, Keio University, in 2007, associate professor in 2015, and professor in 2022. I hold a PhD (academic) and am a certified public psychologist.

Research Program
The Impact of Quality of Education on Children’s Cognitive and Noncognitive Skills

Select Publications

Fujisawa, K.K., Kutsukake, N., & Hasegawa, T. (2005). Reconciliation pattern after aggression among Japanese preschool children. Aggressive Behavior, 31, 138-152.

  1. Hughes, C., Fujisawa, K K., Ensor, R., Lecce, S., & Marfleet, R. (2006). Cooperation and conversations about the mind: A study of individual differences in 2-year-olds and their siblings. British Journal of Developmental Psychology, 24, 53-72.
  2. Fujisawa, K.K., Kutsukake, N., & Hasegawa, T. (2006). Peacemaking and consolation in Japanese preschoolers witnessing peer aggression. Journal of Comparative Psychology, 120, 48-57.
  3. Ando, J., Nonaka, K., Ozaki, K., Sato, N., Fujisawa, K.K., Suzuki, K., Yamagata, S., Takahashi, Y., Nakajima, R., Kato, N., & Ooki., S. (2006). The Tokyo Twin Cohort Project: Overview and initial findings. Twin Research and Human Genetics, 9, 817-826.
  4. Fujisawa, K.K., Kutsukake, N., & Hasegawa, T. (2008). Reciprocity of prosocial behavior in Japanese preschool children. International Journal of Behavioral Development, 32, 89-97.
  5. Fujisawa, K.K., Kutsukake, N., & Hasegawa, T. (2008). The stabilizing role of aggressive children in affiliative social networks among preschoolers. Behaviour, 145, 1577-1600.
  6. Fujisawa, K.K., Kutsukake, N., & Hasegawa, T. (2009). Social network analyses of positive and negative relationships among Japanese preschool classmates. International Journal of Behavioral Development, 33,193-201.
  7. Fujisawa, K.K., Yamagata, S., Ozaki, K., & Ando, J. (2012). Hyperactivity/inattention problems moderate environmental but not genetic mediation between negative parenting and conduct problems. Journal of Abnormal Child Psychology, 40, 189-200.
  8. Fujisawa, K.K., Ozaki, K., Suzuki, K., Yamagata, S., Kawahashi, I., & Ando, J. (2012). The genetic and environmental relationships between head circumference growth in the first year of life and sociocognitive development in the second year: A longitudinal twin study. Developmental Science,15, 99-112.
  9. Nozaki, M., Fujisawa, K.K., Ando, J., & Hasegawa, T. (2012). The effects of sibling relationships on social adjustment among Japanese twins compared with singletons. Twin Research and Human Genetics, 15, 727-736.
  10. Yamagata, S., Takahashi, Y., Ozaki, K., Fujisawa, K.K., Nonaka, K., & Ando, J. (2013). Bidirectional influences between maternal parenting and children’s peer problems: A longitudinal monozygotic twin difference study. Developmental Science, 16, 249-259.
  11. Fujisawa, K.K., Wadsworth, S. J., Kakihana, S., Olson, R. K., DeFries, J.C., Byrne, B., Ando, J. (2013). A multivariate twin study of early literacy in Japanese kana. Learning and Individual Differences, 24, 160-167.
  12. Ando, J., Fujisawa, K.K., Shikishima, C., Hiraishi, K., Nozaki, M., Yamagata, S., Ooki, S. (2013). Two Cohort and Three Independent Anonymous Twin Projects at the Keio Twin Research Center (KoTReC). Twin Research and Human Genetics, 16, 202-216.
  13. Fujisawa, K.K., Todo, N., & Ando, J. (2016). Genetic and environmental influences on the development and stability of executive functions in children of preschool age: A longitudinal study of Japanese twins. Infant and Child Development. [e1994].
  14. Fujisawa, K.K., Todo, N., & Ando, J. (2019). Changes in Genetic and Environmental Influences on Cognitive Ability, Executive Function, and Preacademic Skills in Japanese Preschool Age Twins. Developmental Psychology, 55, 38-52.
  15. Ando, J., Fujisawa, K.K., Hiraishi, K., Shikishima, C., Kawamoto, T., Nozaki, M., Murayama, K. (2019). Psychosocial Twin Cohort Studies in Japan: The Keio Twin Research Center (KoTReC). Twin Research and Human Genetics, 22(6), 591-596. https://doi:10.1017/thg.2019.109

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