KAZUMI SUGIMURA

Last Updated :2024/09/06

Affiliations, Positions
Graduate School of Humanities and Social Sciences, Professor
E-mail
ksugimurahiroshima-u.ac.jp

Basic Information

Major Professional Backgrounds

  • 1992/04/01, 1999/03/31, Aichi Gakusen College, Lecturer
  • 1999/04/01, 2000/03/31, Otemon Gakuin University, Lecturer
  • 2000/04/01, 2002/02/28, Otemon Gakuin University, Associate Professor
  • 2002/03/01, 2011/03/31, Nagoya University, Associate Professor（Associate Professor）
  • 2018/06/28, 2018/09/22, Mykolas Romeris University, Lithuania, Institute of Psychology, Scientific Intern
  • 2019/03/04, 2019/03/10, Mykolas Romeris University, Lithuania, Institute of Psychology, Scientific Intern
  • 2018/07/02, 2018/09/28, Alma Mater Studiorum University of Bologna, Italy, Institute of Advanced Studies (ISA), Senior Visiting Fellow
  • 2019/01/16, 2019/03/23, University of Groningen, the Netherlands, Department of Psychology, Visiting Scholar

Educational Backgrounds

  • Nagoya University, Graduate School, Division of Education, Japan, 1988/04, 1992/03

Academic Degrees

  • Ph.D., Nagoya University

Research Fields

  • Social sciences;Psychology;Educational psychology

Research Keywords

  • development
  • adolescence
  • identity

Educational Activity

Course in Charge

  1. 2024, Undergraduate Education, First Semester, Seminar in Psychological Research Methods
  2. 2024, Undergraduate Education, 1Term, Seminar in Psychological Readings I
  3. 2024, Undergraduate Education, 2Term, Seminar in Psychological Readings II
  4. 2024, Undergraduate Education, 3Term, Seminar in Psychological Readings III
  5. 2024, Undergraduate Education, 4Term, Seminar in Psychological Readings IV
  6. 2024, Undergraduate Education, 4Term, Developmental Psychology
  7. 2024, Undergraduate Education, 2Term, Psychology of Childhood and Adolescence
  8. 2024, Undergraduate Education, Second Semester, Advanced Laboratory Project in Developmental Psychology I
  9. 2024, Undergraduate Education, First Semester, Advanced Laboratory Project in Developmental Psychology II
  10. 2024, Undergraduate Education, Second Semester, Graduation Thesis
  11. 2024, Undergraduate Education, Year, Practical Training in Psychology I
  12. 2024, Undergraduate Education, First Semester, Practical Training in Psychology II
  13. 2024, Undergraduate Education, 2Term, Psychology of Childhood and Adolescence
  14. 2024, Graduate Education (Doctoral Program) , First Semester, Research into Psychology
  15. 2024, Graduate Education (Doctoral Program) , First Semester, Advanced Study in Psychology
  16. 2024, Graduate Education (Doctoral Program) , Second Semester, Research into Psychology
  17. 2024, Graduate Education (Doctoral Program) , Second Semester, Advanced Study in Psychology
  18. 2024, Graduate Education (Master's Program) , 2Term, Special Lecture of Humanities and Social Sciences(English Class) Students enrolled before AY 2023
  19. 2024, Graduate Education (Master's Program) , 2Term, Special Lecture of Humanities and Social Sciences(English Class) Students enrolling in AY 2024 or later
  20. 2024, Graduate Education (Master's Program) , 2Term, Science History for Humanities and Social Sciences(English Class) Students enrolled before AY 2023
  21. 2024, Graduate Education (Master's Program) , 2Term, Science History for Humanities and Social Sciences(English Class) Students enrolling in AY 2024 or later
  22. 2024, Graduate Education (Master's Program) , 3Term, Humanities and Social Sciences and Society(English Class) Students enrolled before AY 2023
  23. 2024, Graduate Education (Master's Program) , 3Term, Humanities and Social Sciences and Society(English Class) Students enrolling in AY 2024 or later
  24. 2024, Graduate Education (Master's Program) , 2Term, Seminar on Methods of Research in Psychology A
  25. 2024, Graduate Education (Master's Program) , 4Term, Seminar on Methods of Research in Psychology B
  26. 2024, Graduate Education (Master's Program) , 2Term, Advanced Seminar on Methods of Research in Psychology A
  27. 2024, Graduate Education (Master's Program) , 4Term, Advanced Seminar on Methods of Research in Psychology B
  28. 2024, Graduate Education (Master's Program) , 1Term, Academic writing in psychology A
  29. 2024, Graduate Education (Master's Program) , 3Term, Academic writing in psychology B
  30. 2024, Graduate Education (Master's Program) , 1Term, Advanced academic writing in psychology A
  31. 2024, Graduate Education (Master's Program) , 3Term, Advanced academic writing in psychology B
  32. 2024, Graduate Education (Master's Program) , First Semester, Special Lecture on Psychology C
  33. 2024, Graduate Education (Master's Program) , Second Semester, Special Lecture on Psychology D
  34. 2024, Graduate Education (Master's Program) , 1Term, Seminar on Psychology I
  35. 2024, Graduate Education (Master's Program) , 2Term, Seminar on Psychology II
  36. 2024, Graduate Education (Master's Program) , 3Term, Seminar on Psychology III
  37. 2024, Graduate Education (Master's Program) , 4Term, Seminar on Psychology IV
  38. 2024, Graduate Education (Master's Program) , 1Term, Advanced Seminar on Psychology I
  39. 2024, Graduate Education (Master's Program) , 2Term, Advanced Seminar on Psychology II
  40. 2024, Graduate Education (Master's Program) , 3Term, Advanced Seminar on Psychology III
  41. 2024, Graduate Education (Master's Program) , 4Term, Advanced Seminar on Psychology IV
  42. 2024, Graduate Education (Master's Program) , First Semester, Special Study
  43. 2024, Graduate Education (Master's Program) , Second Semester, Special Study
  44. 2024, Graduate Education (Doctoral Program) , First Semester, Special Study
  45. 2024, Graduate Education (Doctoral Program) , Second Semester, Special Study

Research Activities

Academic Papers

  1. Adolescents' Identity Development Predicts the Transition and the Adjustment to Tertiary Education or Work, JOURNAL OF YOUTH AND ADOLESCENCE, 52(11), 2344-2356, 202311
    Link to Paper Search Results by DOI
  2. Patterns of personality development and psychosocial functioning in Japanese adolescents: A four-wave longitudinal study, Journal of Youth and Adolescence, 52(5), 1074-1087, 20230500
    Link to Paper Search Results by DOI
  3. Workplace Identity Profiles: Associations with Personality Traits and Work Adaptation of Young Japanese Adults, JOURNAL OF ADULT DEVELOPMENT, 30(3), 256-266, 202309
    Link to Paper Search Results by DOI
  4. Trauma exposure, posttraumatic stress, and identity content valences among Japanese adolescents, JOURNAL OF ADOLESCENCE, 95(5), 975-989, 202307
    Link to Paper Search Results by DOI
  5. Parental Identity Processes Across Cultures: Commitment, In-Depth Exploration and Reconsideration of Commitment Among Parents from the United States, Israel, Poland, South Africa and Japan, IDENTITY-AN INTERNATIONAL JOURNAL OF THEORY AND RESEARCH, 23(3), 193-207, 20230703
    Link to Paper Search Results by DOI
  6. Identity development and online and offline prosocial behaviors among early and middle adolescents, FRONTIERS IN PSYCHOLOGY, 14, 20230525
    Link to Paper Search Results by DOI
  7. Profiles of Emotional Separation and Parental Trust from Adolescence to Emerging Adulthood: Age Differences and Associations with Identity and Life Satisfaction, JOURNAL OF YOUTH AND ADOLESCENCE, 52(3), 475-489, 202303
    Link to Paper Search Results by DOI
  8. Cross-Cultural Comparison of ICD-11 Adjustment Disorder Prevalence and Its Risk Factors in Japanese and Lithuanian Adolescents, BRAIN SCIENCES, 12(9), 202209
    Link to Paper Search Results by DOI
  9. Positive and negative valences of identities: Longitudinal associations of identity content valences with adaptive and maladaptive functioning among Japanese young adults, DEVELOPMENT AND PSYCHOPATHOLOGY, 34(4), 1516-1530, 202210
    Link to Paper Search Results by DOI
  10. Identity Formation and School Experience among University Students in A Teacher Training Program: A Four-Wave Longitudinal Study during the Teaching Practicum, IDENTITY-AN INTERNATIONAL JOURNAL OF THEORY AND RESEARCH, 22(3), 183-197, 20220703
    Link to Paper Search Results by DOI
  11. The Satisfaction with Life Scale in Adolescent Samples: Measurement Invariance across 24 Countries and Regions, Age, and Gender, APPLIED RESEARCH IN QUALITY OF LIFE, 17(4), 2139-2161, 202208
    Link to Paper Search Results by DOI
  12. Diverse Trajectories of Hikikomori Symptoms During Job Search and the Role of Identity Distress: Three Wave Longitudinal Research, FRONTIERS IN PSYCHIATRY, 13, 20220707
    Link to Paper Search Results by DOI
  13. Daily Identity Processes and Emotions in Young Adulthood: a Five-Day Daily-Diary Method, JOURNAL OF YOUTH AND ADOLESCENCE, 51(9), 1815-1828, 202209
    Link to Paper Search Results by DOI
  14. Direction of associations between personality traits and educational identity processes: Between- and within-person associations, JOURNAL OF ADOLESCENCE, 94(5), 763-775, 202207
    Link to Paper Search Results by DOI
  15. Trauma exposure and factors associated with ICD-11 PTSD and complex PTSD in adolescence: a cross-cultural study in Japan and Lithuania, EPIDEMIOLOGY AND PSYCHIATRIC SCIENCES, 31, 20220711
    Link to Paper Search Results by DOI
  16. Trajectories in Sense of Identity and Relationship With Life Satisfaction During Adolescence and Young Adulthood, DEVELOPMENTAL PSYCHOLOGY, 58(5), 977-989, 202205
    Link to Paper Search Results by DOI
  17. Exploring Exploration: Identity Exploration in Real-Time Interactions among Peers, IDENTITY-AN INTERNATIONAL JOURNAL OF THEORY AND RESEARCH, 22(1), 17-34, 20220102
    Link to Paper Search Results by DOI
  18. Attachment hierarchy in Japan: examining the validity of important people interview in Japanese young adults, ATTACHMENT & HUMAN DEVELOPMENT, 24(2), 133-146, 20220304
    Link to Paper Search Results by DOI
  19. Relationships Between Demographic Factors and Trajectories of Identity Distress in Various Life Domains Among Young Adults: A Three-Wave Longitudinal Study, IDENTITY-AN INTERNATIONAL JOURNAL OF THEORY AND RESEARCH, 21(1), 36-50, 20210102
    Link to Paper Search Results by DOI
  20. Association between long-range temporal correlations in intrinsic EEG activity and subjective sense of identity, SCIENTIFIC REPORTS, 11(1), 20210111
    Link to Paper Search Results by DOI
  21. Identity Processes and Identity Content Valences: Examining Bidirectionality, DEVELOPMENTAL PSYCHOLOGY, 57(12), 2265-2280, 202112
    Link to Paper Search Results by DOI
  22. Diverse-and-dynamic pathways in educational and interpersonal identity formation during adolescence: Longitudinal links with psychosocial functioning, Child Development, 91, 1203-1218, 20200616
    Link to Paper Search Results by DOI
  23. Roles of configurations of multiple identity domains in adaptive and maladaptive functioning in Japanese emerging adults: Using a culturally relevant index, Emerging Adulthood, 8(5), 373-381, 20201001
    Link to Paper Search Results by DOI
  24. Adolescent identity development in Japan, Child Development Perspectives, 14(2), 71-77, 20200130
    Link to Paper Search Results by DOI
  25. Do identity processes and psychosocial problems intertwine with each other? Testing the directionality of between- and within-person associations, Journal of Youth and Adolescence, 49, 467-478, 20191227
    Link to Paper Search Results by DOI
  26. Objective and subjective markers of transition to adulthood in emerging adults: Their mediating role in explaining the link between parental trust and life satisfaction, Journal of Social and Personal Relationships, 20200817
    Link to Paper Search Results by DOI
  27. Diverse-and-Dynamic Pathways in Educational and Interpersonal Identity Formation during Adolescence: Longitudinal Links With Psychosocial Functioning, CHILD DEVELOPMENT, 91(4), 1203-1218, 202007
    Link to Paper Search Results by DOI
  28. Parental trust, emotional separation, and psychosocial functioning in preadolescence and early adolescence, Journal of Adolescence, 20200913
    Link to Paper Search Results by DOI
  29. Roles of Configurations of Multiple Identity Domains in Adaptive and Maladaptive Functioning in Japanese Emerging Adults: Using a Culturally Relevant Index, EMERGING ADULTHOOD, 8(5), 373-381, 202010
    Link to Paper Search Results by DOI
  30. The Erikson Psychosocial Stage Inventory in adolescent samples: Factorial validity and equivalence of identity as measured from the United States and Japan, European Journal of Psychological Assessment, 35(5), 680-684, 201909
    Link to Paper Search Results by DOI
  31. A culturally sensitive approach to the relationships between identity formation and religious beliefs in youth., Journal of Youth and Adolescence, 48(4), 668-679, 20190302
    Link to Paper Search Results by DOI
  32. Considering the negatively formed identity: Relationships between negative identity and problematic psychosocial beliefs, Journal of Adolescence, 70, 24-32, 201901
    Link to Paper Search Results by DOI
  33. Longitudinal links between an identity consolidation and psychosocial problem behaviors in adolescence: Using bi-factor latent change and cross-lagged effect models, Journal of Youth and Adolescence, 47, 717-730, 20180318
    Link to Paper Search Results by DOI
  34. A cross-cultural perspective on the relationships between emotional separation, parental trust, and identity in adolescents, Journal of Youth and Adolescence, 47, 749-759, 20180318
    Link to Paper Search Results by DOI
  35. Forming a negative identity in contemporary society: Shedding light on the most problematic identity resolution., Identity: An International Journal of Theory and Research, 18, 325-333, 20181108
    Link to Paper Search Results by DOI
  36. Which came first, personality traits or identity processes during early and middle adolescence?, Journal of Research in Personality, 67, 120-131, 201704
    Link to Paper Search Results by DOI
  37. An examination of negative identity of adolescents using the twenty statements test: Quantitative and qualitative analyses., Japanese Journal of Developmental Pscyhogloy, 28(2), 84-95, 20170630
  38. Is adolescence a period of identity formation for all youth? Insights from a four-wave longitudinal study of identity dynamics in Japan, Developmental Psychology, 53(11), 2113-2126, 201711
    Link to Paper Search Results by DOI
  39. Looking at the dark and bright sides of identity formation: New insights from adolescents and emerging adults in Japan, Journal of Adolescence, 156-168, 201602
    Link to Paper Search Results by DOI
  40. Working together or separately?: The role of identity and cultural self-construal in well-being among Japanese youth, Asian Journal of Social Psychology, 19, 362-373, 201610
    Link to Paper Search Results by DOI
  41. The Features and Relations of Identity Style with well-being in University Students, The Japanese journal of adolescent psychology, 28, 17-27, 20160826
    Link to Paper Search Results by DOI
  42. Perceptions of emerging adulthood: A study with Italian and Japanese university students and young workers, Emerging Adulthood, 3, 229-243, 20150710
    Link to Paper Search Results by DOI
  43. National and gender measurement invariance of the Utrecht-Management of Identity Commitments Scale (U- MICS): A ten-nation cross-cultural study, Assessment, 22(6), 753-768, 20151103
    Link to Paper Search Results by DOI
  44. Cultural self-construction and identity formation in emerging adulthood: A study on Japanese university students and workers, Journal of Youth Studies, 18(10), 1326-1346, 20151006
    Link to Paper Search Results by DOI
  45. National and Gender Measurement Invariance of the Utrecht-Management of Identity Commitments Scale (U-MICS): A 10-Nation Study With University Students., Assessment, 22(6), 753-768, 20151103
    Link to Paper Search Results by DOI
  46. Identity and well-being among young workers in their twenties, Job Stress Research, 21, 229-235, 20140701
  47. Japanese Version of the Utrecht-Management of Identity Commitment Scale (U-MICSJ) : Factor Structure, Reliability, and Concurrent Validity in Japanese University Students, The Japanese Journal of Adolescent Psychology, 25(2), 125-136, 2014
    Link to Paper Search Results by DOI
  48. Examining the reliability and validity of a Japanese version of the 12-item Erikson Psychosocial Stage Inventory (the 5th stage), The Japanese journal of psychology, 85(5), 482-487, 2014
    Link to Paper Search Results by DOI
  49. Researching identity development and statuses with the Dimensions of Identity Development Scale: the Japanese version, The Japanese journal of psychology, 85(6), 549-559, 2014
    Link to Paper Search Results by DOI
  50. The new life stage of emerging adulthood at ages 18-29 years: implications for mental health, LANCET PSYCHIATRY, 1(7), 569-576, 20141200
    Link to Paper Search Results by DOI
  51. Which Person is Important to Relational Identity in Japanese University Students? : Examining associations between identity processes and personality, psychosocial problems, and parent-adolescent relationships for different selected persons, Bulletin of the Graduate School of Education, Hiroshima University, Part III (Education and Human Science), 62, 89-97, 2013
  52. Identity development in the learning sphere among Japanese first-year university students, Child and Youth Care Forum, 40, 25-41, 20110201
    Link to Paper Search Results by DOI
  53. The role of peers as agents of identity formation in Japanese first-year university students, Identity: An International Journal of Theory and Research, 10, 106-121, 20100501
    Link to Paper Search Results by DOI
  54. Compliance, negotiation, and self-assertion in Japanese adolescents' disagreements with parents, International Journal of Behavioral Development, 33, 77-87, 20090101
    Link to Paper Search Results by DOI
  55. Peer Support Activities Based on Consultancy in Pair and Student Initiative : Through the Practice at Nagoya University, The Japanese Journal of Adolescent Psychology, 18, 51-62, 20070228
    Link to Paper Search Results by DOI
  56. A preliminary study of proposed levels of relatedness in identity exploration among female late adolescents in Japan, Psychological Reports, 88, 749-758, 20010601
    Link to Paper Search Results by DOI
  57. A Longitudinal Study of Relatedness in Identity Formation of Female Adolescents, The Japanese Journal of Developmental Psychology, 12, 87-98, 20010701
    Link to Paper Search Results by DOI
  58. Identity Formation and Relatedness in Adolescence, The Japanese journal of developmental psychology, 9(1), 45-55, 19980410
  59. Role Strain among Junior High School Students: In Terms of the Association with Competence and Stress Response, The Japanese Journal of Adolescent Psychology, 8, 27-40, 19970224
  60. Ego identity changes reported by middle-aged women: Comparison among housewives, nurses and school teachers, Japanese Journal of Educational Psychology, 41, 11-21, 19930300

Publications such as books

  1. 2021/12/01, Identity development in East Asia. In B. G. Adams & F. J. R. van de Vijver (Eds.), Non-Western identity: Research and perspectives (pp. 33–47)., Springer, 2021, 2021, Scholarly Book, Joint work, English, Sugimura, K. Umemura, T. Nelson, L. J., 978-3-030-77242-0
  2. 2018/01/02, A different pathway to adulthood? Relationships between identity formation and positive psychological outcomes in Japanese adolescents and emerging adults. In R. Dimitrova (Ed.) Well-being of youth and emerging adults across cultures: Novel approaches and findings from Europe, Asia, Africa and America. Cross-cultural advancements in positive psychology, Vol.12 (pp. 49–60)., Springer, 2018, 01, Scholarly Book, Joint work, English, Sugimura K. Hatano K., 978-3-319-68363-8
  3. 2015/04/10, The intersection of culture, health and risk behaviors in emerging and young adults. In L. A. Jensen (Ed.), The Oxford Handbook of Human Development and Culture: An Interdisciplinary Perspective (pp. 502-518), Oxford University Press, 2015, 4, Scholarly Book, Joint work, English, 9780199948550
  4. 2012/12, Personal identity in Japan. In S. J. Schwartz (Ed.), Identity around the world. New Directions in Child and Adolescent Development, 138, 123-143., Wiley, 2012, 12, Scholarly Book, Joint work, English, 978-1-118-54411-2
  5. 2007/01, Transitions in the process of identity formation among Japanese female adolescents: A relational viewpoint. In R. Josselson, A. Lieblich, & D. P. McAdams (Eds.), The meaning of others: Narrative studies of relationships (pp. 117-142)., American Psychological Association, 2007, 01, Scholarly Book, Single work, English, 978-1-59147-816-4

Invited Lecture, Oral Presentation, Poster Presentation

  1. Identity development among "Hikikomori youth" in Japanese culture: A master narrative approach, Yasui, G., Sugimura, K., Hihara, S., The 29th Annual Conference of International Society for Research on Identity, 2023/06/07, Without Invitation, English
  2. Identity development in transgender youth: Focusing on negotiations with gender norms, 75. Hiro, M., Hihara, S., Sugimura, K., The 29th Annual Conference for International Society for Research on Identity, 2023/06/07, Without Invitation, English
  3. Role of parental identity development in mental health after adolescent children's departure among middle-aged parents in Japan, Saiga, S., Hihara, S., Sugimura, K., The 29th Annual Conference for International Society for Research on Identity, 2023/06/07, Without Invitation, English
  4. Chair, Symposium, Identity matters for well-being and adaptation to transitions: How and when?, Crocetti, E. & Sugimura, K., 2022/08/24, Without Invitation, English
  5. Deviation from master narrative in the Process of constructing life stories of Japanese youth: Focusing on Japanese "Hikikomori" (serious social withdrawal), Yasui, G., Sugimura, K., Hihara, S., The 18th Conference of the European Association for Research on Adolescence,, 2022/08/24, Without Invitation, English
  6. Correspondence between exploration at the action level and the reflection level, Sugimura, K., Saiga, S., & De Ruiter, N. M. P., The 18th Conference of the European Association for Research on Adolescence, 2022/08/24, Without Invitation, English
  7. Identity development predicts task engagement and burnout in the transition to university or work, Sugimura, K., Hihara, S., & Hatano, K., The 18th Conference of the European Association for Research on Adolescence, 2022/08/24, Without Invitation, English
  8. A validation of a scale on mujō-kan (impermanence), Urata, Y., Hihara, S., Nishida, W., Sugimura, K., & Matsushima, K., Meaning in Life (MIL) International Conference, 2022/06/00, Without Invitation, English
  9. Multiple and diverse trajectories in an overall sense of identity and satisfaction with life during adolescence and young adulthood: A three-wave longitudinal study. In K. Sugimura (Chair), The longitudinal relationship between youth identity development and multiple dimensions of adjustment, Hatano, K., Sugimura, K., Nakama, R., & Tsuzuki, M., The 26th Annual Conference of the International Society for Research on Identity, 2019/05/19, Without Invitation, English, Naples, Italy
  10. Chair, Symposium: The longitudinal relationship between youth identity development and multiple dimensions of adjustment, Sugimura, K., The 26th Annual Conference of the International Society for Research on Identity, 2019/05/15, Without Invitation, English, Naples, Italy
  11. Negative identity and identity processes in youth: A three-wave longitudinal research, Hihara, S., Iwasa, Y., Umemura, T., & Sugimura, K., The 26th Annual Conference of the International Society for Research on Identity, 2019/05/14, Without Invitation, English, Naples, Italy
  12. To be or not to be a teacher: Identity development in teacher training college students, Iwasa, Y., Hihara, S., Sugimura, K., & Umemura, T., The 26th Annual Conference of the International Society for Research on Identity, 2019/05/14, Without Invitation, English, Naples, Italy
  13. Chair, Symposium: Identity content in context: Examining salience, conflict, and management among identity domains, Sugimura, K., The 26th Annual Conference of the International Society for Research on Identity, 2019/05/13, Without Invitation, English, Naples, Italy
  14. Exploring important domains and conflicts between domains for emerging adults in the context of contemporary Japan. In K. Sugimura (Chair), Identity content in context: Examining salience, conflict, and management among identity domains, Ishibashi, I., Hihara, S., Umemura, T., & Sugimura, S., The 26th Annual Conference of the International Society for Research on Identity, 2019/05/13, Without Invitation, English, Naples, Italy
  15. Invited Lecture, Identity development in Japan, Sugimura, K., 2019/03/06, With Invitation, English, Institute of Psychology of Mykolas Romeris University, Vilnius, Lithuania
  16. Attachment, personal and social identity, and adjustment in adolescence: Focusing on mediating and moderating roles of social identity. In E. Crocetti (Chair), The multifaceted nature of adolescents' identity., Sugimura, K., Umemura, T., Hatano, K. & Hihara, S., The 16th Biennial Meeting of the European Association for Research on Adolescence, 2018/09/15, Without Invitation, English, Ghent, Belgium
  17. The directionality of effects between identity processes and personality traits in adolescence: Examining between- and within-person associations. Poster presented at the 16th Biennial Meeting of the European Association for Research on Adolescence., Hatano, K., & Sugimura, K., The 16th Biennial Meeting of the European Association for Research on Adolescence, 2018/09/15, Without Invitation, English, Ghent, Belgium
  18. Is a firm sense of identity always positive? longitudinal relationships between negative identity and maladaptive psychosocial functioning. Poster presented at the 16th Biennial Meeting of the European Association for Research on Adolescence., Hihara, S., Umemura, T., & Sugimura, K., The 16th Biennial Meeting of the European Association for Research on Adolescence, 2018/09/14, Without Invitation, English, Ghent, Belgium
  19. Invited lecture, Identity development in Japan., Sugimura, K., Lecture provided at the Institute of Advanced Studies of the Alma Mater Studiorum University of Bologna, 2018/07/10, With Invitation, English, Institute of Advanced Studies of the Alma Mater Studiorum University of Bologna, Bologna, Italy
  20. How do identity processes and subjective well-being influence each other? In E. Crocetti & K. Sugimura (Chairs), Time as a key factor for studying identity., Sugimura, K. & Hatano, K., Society for the Study of Emerging Adulthood (SSEA) Thematic Conference: Self and Identity in Emerging Adulthood, 2018/05/18, Without Invitation, English, Cluj-Napoca, Romania
  21. Chair, Symposium: E. Crocetti & K. Sugimura (Chairs), Time as a key factor for studying identity, Society for the Study of Emerging Adulthood (SSEA) Thematic Conference: Self and Identity in Emerging Adulthood, 2018/05/18, Without Invitation, English, Cluj-Napoca, Romania
  22. The roles of negative identity and instable identity statuses in maladaptive psychosocial functioning among emerging adults, Hihara, S., & Sugimura, K., Society for the Study of Emerging Adulthood (SSEA) Thematic Conference: Self and Identity in Emerging Adulthood, 2018/05/18, Without Invitation, English, Cluj-Napoca, Romania
  23. Relationships between identity configurations, maladaptive functioning, and identity distress in Japanese youth, Ishibashi, I., & Sugimura, K., Society for the Study of Emerging Adulthood (SSEA) Thematic Conference: Self and Identity in Emerging Adulthood, 2018/05/18, Without Invitation, English, Cluj-Napoca, Romania
  24. Panelist, Cultural challenges in the study of identity, Schwartz, S., Walsh, S. D., Seiffge-Krenke, I., & Sugimura, K., Society for the Study of Emerging Adulthood (SSEA) Thematic Conference: Self and Identity in Emerging Adulthood, 2018/05/17, With Invitation, English, Cluj-Napoca, Romania, preprint
    Attached File's URL
  25. Discussant, Adolescents’ identity formation in context: Longitudinal studies from Japan, Italy, and the Netherlands. In A. Becht (Chair), Adolescents’ identity formation in context: Longitudinal studies from Japan, Italy, and the Netherlands, Sugimura, K., The 24th Annual Conference of the International Society for Research on Identity, 2017/05/20, Without Invitation, English, Groningen, the Netherlands
  26. Developmental changes of three identity dimensions in Japanese adolescents: A four wave longitudinal study.In A. Becht (Chair), Adolescents’ identity formation in context: Longitudinal studies from Japan, Italy, and the Netherlands, Hatano, K. & Sugimura, K., The 24th Annual Conference of the International Society for Research on Identity, 2017/05/20, Without Invitation, English, Groningen, the Netherlands
  27. Relationships between separation, connectedness, and identity in Lithuanian, Italian, and Japanese adolescents, Sugimura, K., Žukauskienė, R., Crocetti, E., Kaniušonytė, G., Nakama, R., Hatano, K., & Tsuzuki, M., The 24th Annual Conference of the International Society for Research on Identity, 2017/05/20, Without Invitation, English, Groningen, the Netherlands
  28. Relationships between negative identity and a sense of alienation, Hihara, S. & Sugimura, K., The 24th Annual Conference of the International Society for Research on Identity, 2017/05/20, Without Invitation, English, Groningen, the Netherlands
  29. Invited speaker, Emerging adulthood on Europe and Japan, Sugimura, K., Congress of Lithuanian Psychologists 2017, 2017/05/11, With Invitation, English, Lithuanian Psychologists, Vilnius, Lithuania
  30. Not described in textbooks! Some specific challenge for understanding identity development in Japanese adolescents, Sugimura, K., The 15th Biennial Conference of the European Association of Research on Adolescence, 2016/09/17, Without Invitation, English, Cadiz, Spain
  31. Developmental changes of exploration and commitment dimensions in Japanese adolescents: A four wave longitudinal study., Hatano, K., & Sugimura, K., The 15th Biennial Conference of the European Association of Research on Adolescence, 2016/09/17, Without Invitation, English, Cadiz, Spain
  32. Negative identity integration: Self-event relationships among adolescents choosing a negative identity, Hihara, S., & Sugimura, K., The 15th Biennial Conference of the European Association of Research on Adolescence, 2016/09/17, Without Invitation, English
  33. The relationships between identity formation and religious beliefs among Japanese young adults, Sugimura, K., Matsushima, K., Hihara, S. et al., The 15th Biennial Conference of the European Association of Research on Adolescence, 2016/09/16, Without Invitation, English, Cadiz, Spain
  34. How do Japanese youth draw the trajectories of identity development during adolescence and emerging adulthood?, Hatano, K., & Sugimura, K., The 23rd International Association of Cross-Cultural Psychology, 2016/08/01, Without Invitation, English, Nagoya, Japan
  35. How is identity related to internal and external problem behaviors in adolescence?, Hatano, K., & Sugimura, K., The 31st International Congress of Psychology, 2016/07/25, Without Invitation, English, Yokohama, Japan
  36. Identity developmental trajectories in adolescence and young adulthood: Based on the five dimensional model., Hatano, K., & Sugimura, K., The 31st International Congress of Psychology, 2016/07/25, Without Invitation, English, Yokohama, Japan
  37. The relationships between separation, connectedness, and identity: A reconsideration with Japanese adolescents, Sugimura, K., Nakama, R., Mizokami, S., Hatano, K., & Tsuzuki, M., The 31st International Congress of Psychology, 2016/07/25, Without Invitation, English, Yokohama, Japan
  38. The cross-sectional study on identity development from late childhood to middle adolescence, Nakama,R., Mizokami, S., Sugimura, K., Hatano, K., & Tsuzuki, M., The 31st International Congress of Psychology, 2016/07/25, Without Invitation, English, Yokohama, Japan

External Funds

Acceptance Results of Competitive Funds

  1. KAKENHI(Grant-in-Aid for Scientific Research (C)), 2018, 2021
  2. KAKENHI, 2015, 2017
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  3. KAKENHI, 2012, 2014
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  4. KAKENHI, Processes and mechanisms of identity development from adolescence to young adulthood, 2008, 2011
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  5. KAKENHI, Studies on processes and mechanisms of identity formation in adolescence, 2005, 2007
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  6. KAKENHI, Strategy of Supporting Adolesoent-Needs for Support and Function of Supporter, 2005, 2007
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  7. KAKENHI, Study of the changing mental problems experienced during adolescence-Prevention of, and countermeasures against, rampant problem behaviors, 2003, 2005
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  8. KAKENHI, 2003, 2004
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  9. KAKENHI, 2001, 2002
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  10. KAKENHI, 1998, 1999
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  11. KAKENHI, 1994, 1994
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  12. KAKENHI, 1993, 1993
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Social Activities

History as Committee Members

  1. Past-President, 2024/06, 2025/06, International Society for Research on Identity
  2. Associate Editor, 2024/01, 2024/12, Identity: An International Journal of Theory and Research
  3. National Representative, 2023/08, 2024/09, European Association for Research on Adolescence
  4. President, 2023/06, 2024/06, International Society for Research on Identity
  5. Associate Editor, 2023/01, 2023/12, Identity: An International Journal of Theory and Research
  6. National Representative, 2022/08, 2023/08, European Association for Research on Adolescence
  7. President-elect, 2022/06, 2023/06, International Society for Research on Identity
  8. Associate Editor, 2022/01, 2022/12, Identity: An International Journal of Theory and Research
  9. National Representative, 2021/08, 2022/08, European Association for Research on Adolescence
  10. President-elect, 2021/06, 2022/06, International Society for Research on Identity
  11. Associate Editor, 2021/01, 2021/12, Identity: An International Journal of Theory and Research
  12. National Representative, 2020/08, 2021/08, European Association for Research on Adolescence
  13. National representative, 2019/08, 2020/08, European Association for Research on Adolescence
  14. Thematic Conference: Self and Identity in Emerging Adulthood， Conference Awards Committee, 2018/.5, 2018/.5, Society for the Study of Emerging Adulthood
  15. Thematic Conference: Self and Identity in Emerging Adulthood， Scientific Committee, 2018/.5, 2018/.5, Society for the Study of Emerging Adulthood
  16. Project Reviewer, 2017/.8, 2017/.8, Czech Science Foundation， Department of Social Sciences and Humanities
  17. The 17th Biennial Meeting， Reviewer (Panel 16: Personality and identity development), 2017/.1, 2017/.1, Society for Research on Adolescence
  18. Emerging Psychologist Program Committee, 2016, 2016, The 31 International Congress of Psychology
  19. Asia Topic Network， Chair, 2016, 2017, Society for the Study on Emerging Adulthood
  20. Program Committee, 2006, 2020, Society for Research on Identity Formation

History as Peer Reviews of Academic Papers

  1. 2023, Journal of Adolescence, Others, Reviewer, 1
  2. 2023, Journal of Youth and Adolescence, Others, Reviewer, 1
  3. 2023, Identity: An International Journal of Theory and Research, Editor, Associate Editor, 6
  4. 2022, Identity: An International Journal of Theory and Research, Others, Associate Editor, 4
  5. 2021, Identity: An International Journal of Theory and Research, Others, Associate Editor, 6
  6. 2020, Identity: An International Journal of Theory and Research, Others, Associate Editor, 3
  7. 2019, Emerging adulthood, Editor, Assistant Editor, 3
  8. 2019, Journal of Adolescence, Editor, Reviewer, 1
  9. 2019, Identity, Editor, Reviewer, 1
  10. 2019, Journal of Research on Adolescence, Editor, Reviewer, 1
  11. 2019, European Journal of Developmental Psychology, Editor, Reviewer, 1
  12. 2018, Emerging Adulthood, Editor, Assistant Editor, 7
  13. 2018, Identity, Others, Reviewer, 2
  14. 2017, Emerging Adulthood, Editor, Assistant Editor, 4
  15. 2017, Journal of Adolescence, Others, Reviewer, 1
  16. 2017, Developmental Psychology, Others, Reviewer, 1
  17. 2017, Identity, Editor, Reviewer, 1
  18. 2016, Emerging Adulthood, Editor, Assistant Editor, 3
  19. 2016, Developmental Psychology, Others, Reviewer, 1
  20. 2016, Emerging Adulthood, Others, Reviewer, 1
  21. 2015, Journal of Adolescence, Others, Reviewer
  22. 2014, Emerging Adulthood, Others, Reviewer
  23. 2013, Identity, Others, Reviewer
  24. 2012, Child Development, Others, Reviewer
  25. 2012, Identity, Others, Reviewer