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Motohiro Sakai

Biographic Data

ID6814875
NAMEMotohiro Sakai
GIVEN NAMESMotohiro
FAMILY NAMESakai
SIGNATURESAKAI M
AFFILIATIONSUniversity of Miyazaki
ORCID0000-0002-7944-3001
VERIFIEDYes
TOTAL WORKS13
TOTAL CITATIONS0
AUTHOR COUNT13
EDITOR COUNT0
FIRST PUBLICATION YEAR2013
LATEST PUBLICATION YEAR2025
H-INDEX0
  • Development of a questionnaire for evaluating supporters’ skills in Hikikomori support

    Open Access•Hiroaki Kubo, Keiko Naono-Nagatomo et al.•ARTICLE•Current Psychology•2025

    Enhancing the skills of hikikomori supporters inherently contributes to improving the quality of support provided. However, a comprehensive skills assessment tool for these supporters has not yet been developed. This study aimed to develop a self-rated questionnaire, the Hikikomori Supporter’s Skills Checklist (HSSC). Based on a preliminary survey involving 43 supporters, the HSSC draft was revised. The revised version comprises 39 items addressi…

  • Functioning, disability, and health of individuals with Hikikomori (prolonged social withdrawal) and their families

    Open Access•Shunsuke Nonaka, Hiroaki Kubo et al.•ARTICLE•International Journal of Social…•2025

  • Successful remote treatment of a client with Hikikomori using internet-delivered cognitive therapy for social anxiety disorder

    Open Access•Motohiro Sakai, Naoki Yoshinaga et al.•ARTICLE•Frontiers in Psychiatry•2024

    Hikikomori (prolonged social withdrawal) has been discussed as a hidden worldwide epidemic and a significant social and healthcare issue. Social anxiety disorder is the most common psychiatric disorder preceding the onset of Hikikomori. Although studies exist suggesting the effectiveness of family-support interventions, little is known about psychotherapeutic approaches for Hikikomori individuals. Here, we present a case of Hikikomori wherein an …

  • Individuals with hikikomori and their families’ cognitive behavioral factors

    Open Access•Shunsuke Nonaka, Hironori Shimada et al.•ARTICLE•Current Psychology•2023

  • Development of a 3‐Day Intervention Program for Family Members of Hikikomori Sufferers 1

    Open Access•Hiroaki Kubo, Hiromi Urata et al.•ARTICLE•Japanese Psychological Research•2023

    Hikikomori (a severe form of social withdrawal) is a serious mental health issue. A family approach is the initial step to support hikikomori ; thus effective family intervention programs are warranted. We recently developed a 5‐day family intervention program (120 min weekly) based on Mental Health First Aid (MHFA) and Community Reinforcement and Family Training (CRAFT). In the present study, we modified the 5‐day program to a 3‐day program (180…

  • The suitability of outing frequency as a definition of hikikomori (prolonged social withdrawal)

    Open Access•Shunsuke Nonaka, Motohiro Sakai•ARTICLE•Frontiers in Psychiatry•2023

    These results indicate that outing frequency tends to be suitable as one of the conditions for hikikomori. However, they indicate that we should also focus on the quality of outings, that is, outings with or without interpersonal interaction, to evaluate hikikomori consistently with previous findings. Further research is needed to clarify the appropriate frequency of outings to define hikikomori and determine its severity

  • Day Intervention Program for Family Members of Hikikomori Sufferers

    Open Access•Hiroaki Kubo, Hiromi Urata et al.•ARTICLE•Frontiers in Psychiatry•2023

    We could not draw general conclusions on the effectiveness of the program due to the study discontinuation. Nevertheless, this study indicates the necessity for revision of the program to improve family members' confidence in engaging with hikikomori sufferers, with safer approaching by families

  • The Psychometric Properties of a Self- Report Scale on Assessing Social Interaction of People With Prolonged Social Withdrawal (Hikikomori)

    Open Access•Shunsuke Nonaka, Motohiro Sakai•ARTICLE•Current Psychology•2022

  • Behavioral Repertoire of Families for Coping with Individuals with Hikikomori (Prolonged Social Withdrawal) in Japan1

    Open Access•Shunsuke Nonaka, Hironori Shimada et al.•ARTICLE•Japanese Psychological Research•2021

    This study aimed to examine the characteristics of families’ behavioral repertoires in hikikomori (prolonged social withdrawal) cases. We asked 243 parents of individuals with hikikomori ( hikikomori group) to complete the Family Behavioral Repertoire Scale for Coping With Hikikomori (FBS‐H), the Negative Evaluation of Hikikomori Scale, and a self‐efficacy measure of coping with problem behaviors of hikikomori in order to develop the FBS‐H and to…

  • Family Behavioral Repertoires and Family Interaction Influence the Adaptive Behaviors of Individuals With Hikikomori

    Open Access•Shunsuke Nonaka, Hironori Shimada et al.•ARTICLE•Frontiers in Psychiatry•2020

    Background: Family support is key in the initial stages of psychological support for individuals with hikikomori . However, it remains necessary to confirm the relationship between families' cognitive behavioral factors and the severity of hikikomori to understand ways of improving hikikomori. We examined the influences of family behavioral repertoires for coping with hikikomori and family interaction on the adaptive behaviors of individuals with…

  • Characteristics of Family Interaction of Individuals with Hikikomori (Prolonged Social Withdrawal) From the Viewpoint of Behavior Theory

    Open Access•Shunsuke Nonaka, Hironori Shimada et al.•ARTICLE•Japanese Psychological Research•2019

    The cognitive behavioral approach for families of individuals with hikikomori (IWH) places importance on assessing family interaction from a behavior theory. However, there is no gold standard method for the assessment of family interaction of IWH. Additionally, the characteristics of the family interactions of IWH have not been clarified. This study aims to (a) develop the Family Interaction Scale for Hikikomori (FIS‐H) using parent‐reported dat…

  • Assessing adaptive behaviors of individuals with hikikomori (prolonged social withdrawal)

    Shunsuke Nonaka, Hironori Shimada et al.•ARTICLE•International Journal of Culture…•2017•References: 1

    It is important to appropriately assess the adaptive behaviors of individuals with hikikomori (IWH) using parent reports. However, currently, there is no gold standard in the assessment of adaptive behaviors of IWH. This study aimed to: (1) develop the Adaptive Behaviors Scale for Hikikomori (ABS-H); (2) examine the factor structure of the ABS-H; and (3) examine the reliability and validity of ABS-H. A factor analysis and item response theory (IR…

  • General condition of hikikomori (prolonged social withdrawal) in Japan

    Open Access•Naoji Kondo, Motohiro Sakai et al.•ARTICLE•International Journal of Social…•2013

    BACKGROUND: The issue of hikikomori (prolonged social withdrawal) among Japanese youth has attracted attention from international experts. In previous research, the unique cultural and social factors of Japanese society have been the focus; however, in order to resolve the problem of hikikomori, individual mental health problems must be included. AIM: We examined the psychiatric background of individuals with hikikomori. METHODS: We recruited 337…

No prominent works on this page.

  • General condition of hikikomori (prolonged social withdrawal) in Japan

    Open Access•Naoji Kondo, Motohiro Sakai et al.•ARTICLE•International Journal of Social…•2013

    BACKGROUND: The issue of hikikomori (prolonged social withdrawal) among Japanese youth has attracted attention from international experts. In previous research, the unique cultural and social factors of Japanese society have been the focus; however, in order to resolve the problem of hikikomori, individual mental health problems must be included. AIM: We examined the psychiatric background of individuals with hikikomori. METHODS: We recruited 337…

  • Assessing adaptive behaviors of individuals with hikikomori (prolonged social withdrawal)

    Shunsuke Nonaka, Hironori Shimada et al.•ARTICLE•International Journal of Culture…•2017•References: 1

    It is important to appropriately assess the adaptive behaviors of individuals with hikikomori (IWH) using parent reports. However, currently, there is no gold standard in the assessment of adaptive behaviors of IWH. This study aimed to: (1) develop the Adaptive Behaviors Scale for Hikikomori (ABS-H); (2) examine the factor structure of the ABS-H; and (3) examine the reliability and validity of ABS-H. A factor analysis and item response theory (IR…

  • Characteristics of Family Interaction of Individuals with Hikikomori (Prolonged Social Withdrawal) From the Viewpoint of Behavior Theory

    Open Access•Shunsuke Nonaka, Hironori Shimada et al.•ARTICLE•Japanese Psychological Research•2019

    The cognitive behavioral approach for families of individuals with hikikomori (IWH) places importance on assessing family interaction from a behavior theory. However, there is no gold standard method for the assessment of family interaction of IWH. Additionally, the characteristics of the family interactions of IWH have not been clarified. This study aims to (a) develop the Family Interaction Scale for Hikikomori (FIS‐H) using parent‐reported dat…

  • Family Behavioral Repertoires and Family Interaction Influence the Adaptive Behaviors of Individuals With Hikikomori

    Open Access•Shunsuke Nonaka, Hironori Shimada et al.•ARTICLE•Frontiers in Psychiatry•2020

    Background: Family support is key in the initial stages of psychological support for individuals with hikikomori . However, it remains necessary to confirm the relationship between families' cognitive behavioral factors and the severity of hikikomori to understand ways of improving hikikomori. We examined the influences of family behavioral repertoires for coping with hikikomori and family interaction on the adaptive behaviors of individuals with…

  • Behavioral Repertoire of Families for Coping with Individuals with Hikikomori (Prolonged Social Withdrawal) in Japan1

    Open Access•Shunsuke Nonaka, Hironori Shimada et al.•ARTICLE•Japanese Psychological Research•2021

    This study aimed to examine the characteristics of families’ behavioral repertoires in hikikomori (prolonged social withdrawal) cases. We asked 243 parents of individuals with hikikomori ( hikikomori group) to complete the Family Behavioral Repertoire Scale for Coping With Hikikomori (FBS‐H), the Negative Evaluation of Hikikomori Scale, and a self‐efficacy measure of coping with problem behaviors of hikikomori in order to develop the FBS‐H and to…

  • The Psychometric Properties of a Self- Report Scale on Assessing Social Interaction of People With Prolonged Social Withdrawal (Hikikomori)

    Open Access•Shunsuke Nonaka, Motohiro Sakai•ARTICLE•Current Psychology•2022

  • Individuals with hikikomori and their families’ cognitive behavioral factors

    Open Access•Shunsuke Nonaka, Hironori Shimada et al.•ARTICLE•Current Psychology•2023

  • Development of a 3‐Day Intervention Program for Family Members of Hikikomori Sufferers 1

    Open Access•Hiroaki Kubo, Hiromi Urata et al.•ARTICLE•Japanese Psychological Research•2023

    Hikikomori (a severe form of social withdrawal) is a serious mental health issue. A family approach is the initial step to support hikikomori ; thus effective family intervention programs are warranted. We recently developed a 5‐day family intervention program (120 min weekly) based on Mental Health First Aid (MHFA) and Community Reinforcement and Family Training (CRAFT). In the present study, we modified the 5‐day program to a 3‐day program (180…

  • The suitability of outing frequency as a definition of hikikomori (prolonged social withdrawal)

    Open Access•Shunsuke Nonaka, Motohiro Sakai•ARTICLE•Frontiers in Psychiatry•2023

    These results indicate that outing frequency tends to be suitable as one of the conditions for hikikomori. However, they indicate that we should also focus on the quality of outings, that is, outings with or without interpersonal interaction, to evaluate hikikomori consistently with previous findings. Further research is needed to clarify the appropriate frequency of outings to define hikikomori and determine its severity

  • Day Intervention Program for Family Members of Hikikomori Sufferers

    Open Access•Hiroaki Kubo, Hiromi Urata et al.•ARTICLE•Frontiers in Psychiatry•2023

    We could not draw general conclusions on the effectiveness of the program due to the study discontinuation. Nevertheless, this study indicates the necessity for revision of the program to improve family members' confidence in engaging with hikikomori sufferers, with safer approaching by families

  • Successful remote treatment of a client with Hikikomori using internet-delivered cognitive therapy for social anxiety disorder

    Open Access•Motohiro Sakai, Naoki Yoshinaga et al.•ARTICLE•Frontiers in Psychiatry•2024

    Hikikomori (prolonged social withdrawal) has been discussed as a hidden worldwide epidemic and a significant social and healthcare issue. Social anxiety disorder is the most common psychiatric disorder preceding the onset of Hikikomori. Although studies exist suggesting the effectiveness of family-support interventions, little is known about psychotherapeutic approaches for Hikikomori individuals. Here, we present a case of Hikikomori wherein an …

  • Development of a questionnaire for evaluating supporters’ skills in Hikikomori support

    Open Access•Hiroaki Kubo, Keiko Naono-Nagatomo et al.•ARTICLE•Current Psychology•2025

    Enhancing the skills of hikikomori supporters inherently contributes to improving the quality of support provided. However, a comprehensive skills assessment tool for these supporters has not yet been developed. This study aimed to develop a self-rated questionnaire, the Hikikomori Supporter’s Skills Checklist (HSSC). Based on a preliminary survey involving 43 supporters, the HSSC draft was revised. The revised version comprises 39 items addressi…

  • Functioning, disability, and health of individuals with Hikikomori (prolonged social withdrawal) and their families

    Open Access•Shunsuke Nonaka, Hiroaki Kubo et al.•ARTICLE•International Journal of Social…•2025

Psychology (12 works) · Youth Substance Use and School Attendance (12 works) · Child and Adolescent Psychosocial and Emotional Development (11 works) · Clinical Psychology (11 works) · Developmental psychology (7 works) · Social withdrawal (7 works) · Psychiatry (5 works) · Clinical Psychology (4 works) · Parental Involvement in Education (4 works) · Medicine (3 works)

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