Academic Experiences

• 2026 – Present　Research Fellow for Young Scientists (PD)

  • Funder: Japan Society for the Promotion of Science (JSPS)

  • Host: Dr. Yasuhiro Kanakogi (The University of Osaka)

• 2025 – 2026　Research Fellow for Young Scientists (PD)

  • Funder: Japan Society for the Promotion of Science (JSPS)

  • Host: Dr. Yusuke Moriguchi (Kyoto University)

• 2024 – 2025　Research Fellow for Young Scientists (DC2)

  • Funder: Japan Society for the Promotion of Science (JSPS)

  • Host: Dr. Yusuke Moriguchi (Kyoto University)

• 2022 – 2024　SPRING Fellow

  • Funder: Division of Graduate Studies, Kyoto University

  • Host: Dr. Yusuke Moriguchi (Kyoto University)

Educational Background

• 2022 – 2025　Ph.D. (Letters), Kyoto University, Japan

  • Topic: Developmental Psychology

  • Thesis: 子どもにおける反応的な攻撃行動の認知的基盤 [Link]
    Translated Title: The Cognitive Basis of Reactive Aggressive Behavior in Children 

  • Supervisor: Dr. Yusuke Moriguchi

• 2020 – 2022　M.A. (Letters), Kyoto University, Japan

  • Topic: Developmental Psychology

  • Thesis: 子どもの敵意帰属バイアスに関する検討
    Translated Title: Hostile Intent Attribution in Children

  • Supervisor: Dr. Yusuke Moriguchi

• 2015 – 2020　B.A. (Environment and Information Studies), Keio University, Japan

  • Topic: Developmental Psychology

  • Thesis: 幼児期における創造的な類推について
    Translated Title: Abduction Skills During Early Childhood

  • Supervisor: Dr. Mutsumi Imai

Publications

PEER-REVIEWED JOURNAL ARTICLES (ENGLISH)

1. Kuwamizu, R., Yamamoto, N., Otani, K., & Moriguchi, Y. (in press). Emergent blink rate in early childhood is associated with neural origins of executive function. Communications Psychology.

2. Otani, K., Watanabe, R., Kuwamizu, R., Yamamoto, N., & Moriguchi, Y. (2026). The developmental origin of inner speech: Evidence from a mental counting task in 3- to 6-year-old children. Acta Psychologica, 270(107716), 107716. https://doi.org/10.1016/j.actpsy.2026.107716 [Full Text Link]

3. Yamamoto, N., Kajita, M., Kanazawa, H., & Moriguchi, Y. (2026). The structure of subjective reward values differs between children and adults. Collabra: Psychology, 12(1), 162320. https://doi.org/10.1525/collabra.162320 [Full Text Link]

4. Yamamoto, N., & Moriguchi, Y. (2025). Hostile Cognitions and Aggressive Responses Toward Excluders in Young Children. Journal of Interpersonal Violence. https://doi.org/10.1177/08862605251336346 [PDF Link]

5. Yamamoto, N., Kuwamizu, R., & Moriguchi, Y. (2025). Hostile cognitions and emotions following social exclusion in Japanese adults and young children. Journal of Experimental Child Psychology. https://doi.org/10.1016/j.jecp.2025.106200 [PDF Link]

6. Yamamoto, N., Ohigashi, S., Todo, N., & Moriguchi, Y. (2023). The Relationship Between Hostile Intent Attribution and Aggression in Japanese Children. Child Psychiatry and Human Development. https://doi.org/10.1007/s10578-023-01623-9 [Full Text Link]

7. *Hagihara, H., *Yamamoto, N., Meng, X., Sakata, C., Wang, J., Watanabe, R., & Moriguchi, Y. (2022). COVID-19 school and kindergarten closure relates to children’s social relationships: a longitudinal study in Japan. Scientific Reports, 12(814). https://doi.org/10.1038/s41598-022-04944-2 [Full Text Link]
   *equal contribution.

PEER-REVIEWED JOURNAL ARTICLES (JAPANESE)

1. Yamamoto, N. (2026). 社会的排除経験にかかわる乳幼児研究の動向および展望. Cognitive Studies: Bulletin of the Japanese Cognitive Science Society, 33(3). https://doi.org/10.11225/cs.2026.019  [PDF Link]
   Translated Title: Current trends and future perspectives in research on social exclusion during infancy and early childhood

2. Ikeda, H., Ni, N., Yamamoto, N., Kusumi, T. (2025). なつかしさに自己不連続性が与える影響—Sedikides, Wildschut, Routledge, & Arndt（2015）の概念的追試—. The Japanese Journal of Cognitive Psychology, 22(2), 125–144.  https://doi.org/10.5265/jcogpsy.22.125 [PDF Link]  
   Translated Title: The influence of self-discontinuity on nostalgia: A conceptual replication of Sedikides, Wildschut, Routledge, & Arndt (2015)

3. Moriguchi, Y., Wang, J., Sakata, C., Meng, X., Hagihara, H., Yamamoto, N., Watanabe, R. (2022). 新型コロナウィルスによるパンデミック下の社会性発達に関する横断的・縦断的検討. The Japanese Journal of Developmental Psychology, 33(4), 325–331. https://cir.nii.ac.jp/crid/1520013663278499328 [PDF Link]
   Translated Title: Cross-Sectional and Longitudinal Studies of Social Development During the COVID-19 Pandemic

Conference Presentations

ORAL (DOMESTIC)

1. Yamamoto, N. (March 3–5, 2026). When the Ball Stops Coming: From Experiencing Social Exclusion to Aggressive Behavior in Early Childhood. The 37th Annual Meeting for the Japan Society of Developmental Psychology, Fukuoka, Japan.

2. Yamamoto, N. (March 5–7, 2022). 子どもの敵意帰属バイアスと攻撃行動の関連について. The 33rd Annual Meeting for the Japan Society of Developmental Psychology, Online.
   Translated Title: The Relationship Between Hostile Attribution Bias and Aggressive Behavior in Children

POSTERS (INTERNATIONAL)

1. Yamamoto, N. & Moriguchi, Y. (July 21–23, 2026). Do Aggressive Responses Differ Between Ostracism vs Rejection?: Preliminary Ongoing Study with Arranged-Cyberball. ISRA WORLD MEETING 2026 (ISRA2026), Canada.

2. Otani, K., Watanabe, R., Kuwamizu, R., Yamamoto, N. & Moriguchi, Y. (June 21–25, 2026). The Developmental Origin of Inner Speech: Evidence from a Mental Counting Task in Preschoolers. The 28th Biennial Meeting of the ISSBD (ISSBD 2026), Korea.

3. Yamamoto, N.,  Kajita, M., Kanazawa, H., & Moriguchi, Y. (June 21–25, 2026). Subjective Values of Rewards in Children and Adults. The 28th Biennial Meeting of the ISSBD (ISSBD 2026), Korea.

4. Yamamoto, N. & Moriguchi, Y. (May 1–3, 2025). Hostile Cognitions and Aggressive Responses Toward Social Excluders in Japanese Preschoolers. 2025 SRCD Biennial Meeting, Minneapolis, Minnesota, USA.

5. Yamamoto, N. & Moriguchi, Y. (July 29–August 2, 2024). Emotional Responses and Hostile Thoughts After Social Exclusion in Japanese Adults and Children. ISRA WORLD MEETING 2024 (ISRA2024), Munich, Germany.

6. Yamamoto, N. & Moriguchi, Y. (January 4–6, 2024). The Effects of Experiencing Social Exclusion on Hostile Thoughts in Young Children. 14th Annual Budapest CEU Conference on Cognitive Development (BCCCD) Meeting 2024, Budapest, Hungary.

7. Yamamoto, N., Ohigashi, S., Todo, N., & Moriguchi, Y. (March 23–25, 2023). The Correlation and Mediation Relationship Between Hostile Intent Attribution and Aggression in Japan. 2023 SRCD Biennial Meeting, Salt Lake City, Utah, USA.

POSTERS (DOMESTIC)

1. Otani, K., Watanabe, R., Kuwamizu, R., Yamamoto, N., & Moriguchi, Y. (September 5–7, 2025). 子どもの内なる言葉、どう測るか メンタルカウンティング課題を通じた内言の客観的測定とその発達過程の検討. The 89th Annual Convention of the Japanese Psychological Association, Miyagi, Japan. [Presentation Award (優秀発表賞)]
   Translated Title: Measuring Children's Inner Speech: Objective Measurement of Inner Speech Through Mental Counting Tasks and Examination of Its Developmental Process

2. Yamamoto, N. & Moriguchi, Y. (March 4–6, 2025). 5-6歳児における社会的排除者への敵対的認知と攻撃行動. The 36th Annual Meeting for the Japan Society of Developmental Psychology, Tokyo, Japan.
   Translated Title: Hostile cognition and aggressive behavior toward social excluders in 5-6 year olds

3. Yamamoto, N., Kuwamizu, R. & Moriguchi, Y. (September 6–8, 2024). 社会的排除経験がのちの敵対的認知および感情に及ぼす影響 日本の成人および幼児を対象とした検討. The 88th Annual Convention of the Japanese Psychological Association, Kumamoto, Japan. [Special Presentation Award (特別優秀発表賞)]
   Translated Title: The Effects of Social Exclusion on Later Hostile Cognition and Emotions in Japanese Adults and Children

4. Kuwamizu, R., Otani, K., Yamamoto, N., & Moriguchi, Y. (September 6–8, 2024). 内言と外言で瞳孔応答は異なるか 若齢成人を対象としたカウンティングタスクによる検討. The 88th Annual Convention of the Japanese Psychological Association, Kumamoto, Japan. [Special Presentation Award (特別優秀発表賞)]
   Translated Title: Do pupil responses differ between internal and external speech? An examination using a counting task in young adults

5. Kuwamizu, R., Yamamoto, N., & Moriguchi, Y. (August 24, 2024). ３〜６歳児における実行機能発達と前頭前野機能的特化: 切り替え課題DCCSを用いたfNIRS研究. The 24th Annual Meeting of the Japanese Society of Baby Science, Tokyo, Japan.
   Translated Title: Development of Executive Function and Prefrontal Functional Specialization in 3- to 6-year-old children: a fNIRS study using the DCCS switching task

6. Yamamoto, N.,  Kajita, M., Kanazawa, H., & Moriguchi, Y. (August 5–6, 2023). 子どもと成人における報酬への主観的評価の検討. The 23rd Annual Meeting of the Japanese Society of Baby Science, Osaka, Japan.
   Translated Title: The Subjective Values for Rewards in Children and Adults

7. Yamamoto, N., Ohigashi, S., & Moriguchi, Y. (September 8–10, 2022). 学童期の子どもにおける表情解釈と敵意帰属バイアスおよび攻撃性の関連. The 39th Annual Meeting of Japanese Cognitive Science Society, Online.
   Translated Title: The Relationship between Interpretation of Ambiguous Facial Expressions, Hostile Intent Attribution and Aggression in School-Aged Children

8. Yamamoto, N., Ohigashi, S., & Moriguchi, Y.  (June 12–13, 2021). 日本の子どもにおける敵意帰属バイアスと攻撃性の関連. The 21st Annual Meeting of the Japanese Society of Baby Science, Online.
   Translated Title: The Relationship Between Hostile Attribution Bias and Aggression in Japanese Children

9. Yamamoto, N. & Imai, M. (September 17–19, 2020). 仮説形成に関わる類推能力の発達. The 37th Annual Meeting of Japanese Cognitive Science Society, Online.
   Translated Title: The Development of Analogical Skills in Abduction

Fundings

• 2026 – Present　Grant-in-Aid for JSPS Research Fellows (3,510,000 JPY)

  • Funder: Japan Society for the Promotion of Science (JSPS)

• 2025 – 2026　Joint Usage / Joint Research program at ARIHHP (100,000 JPY) 

  • Funder: Advanced Research Initiative for Human High Performance, University of Tsukuba

• 2025 – Present　The 5th academist prize (1,100,390 JPY)

  • Funder: Academist Inc

• 2024 – 2026　Grant-in-Aid for JSPS Research Fellows (1,500,000 JPY)

  • Funder: Japan Society for the Promotion of Science (JSPS)

• Mar, 2023　SRCD Graduate Student Travel Award (300 USD) 

  • Funder: 2023 SRCD Biennial Meeting

• 2022 – 2024　Support for Pioneering Research Initiated by the Next Generation (800,000 JPY) 

  • Funder: Division of Graduate Studies, Kyoto University (DoGS SPRING)

Awards

1. Otani, K., Watanabe, R., Yamamoto, N., & Kuwamizu, R. (2026). academist Prize for 第5期 企業賞, Academist Inc. [Link]
   Translated Title: Sponsorship Awards from the sponsoring companies of the 5th academist prize

2. Yamamoto, N. (2026). New Investigators Program, International Society for Research on Aggression (ISRA).  [Link]

3. Otani, K., Watanabe, R., Kuwamizu, R., Yamamoto, N., & Moriguchi, Y. (2025). 優秀発表賞, The 89th Annual Convention of the Japanese Psychological Association. [Link]
   Translated Title: Presentation Award from The 89th Annual Convention of the Japanese Psychological Association

4. Otani, K., Watanabe, R., Yamamoto, N., & Kuwamizu, R.  (2025). academist Prize for 第5期, Academist Inc.  [Link]
   Translated Title: The 5th academist prize from Academist Inc

5. Yamamoto, N., Kuwamizu, R. & Moriguchi, Y. (2024). 特別優秀発表賞, The 88th Annual Convention of the Japanese Psychological Association. [Link]
   Translated Title: Special Presentation Award from The 88th Annual Convention of the Japanese Psychological Association

6. Kuwamizu, R., Otani, K., Yamamoto, N., & Moriguchi, Y. (2024). 特別優秀発表賞, The 88th Annual Convention of the Japanese Psychological Association. [Link]
   Translated Title: Special Presentation Award from The 88th Annual Convention of the Japanese Psychological Association

7. Yamamoto, N. (March 2023). SRCD Graduate Student Travel Award, 2023 SRCD Biennial Meeting.

Academic Activities

• 2026 – Present　Member of the Domestic Research Exchange Committee, Japan Society of Developmental Psychology [Link]

• 2025 – Present　Member of the executive committee, Early Career Researchers Association in Japanese Cognitive Science Society [Link]

• 2024 – Present　Chair, Japanese Society of Developmental Psychology for Early-Career Researchers [Link]

• 2022 – 2025　Vice-Chair, Early Career Researchers Association in Japanese Cognitive Science Society [Link]

Teaching Experiences

• 2026　Part-time Lecturer (Ritsumeikan University, Japan)

  • Class: 乳幼児心理学
    Translated Title: Infant and Early Childhood Psychology

• 2025　Part-time Lecturer (Kyoto University, Japan)

  • Class: 心理学講読
    Translated Title: Psychology Seminar

• 2023　Part-time Lecturer (Kyoto University of Arts, Japan)

  • Class: 教育心理学
    Translated Title: Educational Psychology

• 2021, 2022　Teaching Assistant (Kyoto University, Japan)

  • Class: ILASセミナー ：こころの未来セミナー“行動と脳とこころをつなぐ実験心理学”
    Translated Title: ILAS Seminar: Kokoro seminar "Experimental Psychology Bridging Behavior, Brain and Mind"

Professional Memberships

• 2025 – Present　International Society for Research on Aggression (ISRA)

• 2024 – Present　The Japanese Psychological Association (JPA)

• 2023 – Present　Japan Society of Developmental Psychology (JSDP)

• 2022 – Present　Society for Research in Child Development (SRCD)

• 2020 – Present　Japanese Cognitive Science Society (JCSS)

Peer Review Activities

• BMC Psychology

• Japanese Psychological Research

Skills 

• Language: Japanese (native), English (intermediate)

• Programming: R (intermediate), HTML (basic), JavaScript (basic), CSS (basic)

• Software: PsychoPy (intermediate), Adobe Illustrator (intermediate), Adobe Photoshop (basic)

Papers in process

• [English paper] 

  • Kuwamizu, R., Yamamoto, N., Otani, K., & Moriguchi, Y. (under review)
    preprint doi: 10.64898/2026.07.16.738912 

  • Kuwamizu, R., Watanabe, R., Yamamoto, N., Otani, K., & Moriguchi, Y. (under review)
    preprint doi: 10.64898/2026.03.29.715074

  • Iwasaki, S., Yamamoto, N., & Moriguchi, Y. (under review)

  •