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Yoshiki Koga

Biographic Data

ID6516652
NAMEYoshiki Koga
GIVEN NAMESYoshiki
FAMILY NAMEKoga
SIGNATUREKOGA Y
AFFILIATIONSKurihama Medical and Addiction Center
ORCID0000-0002-5249-7544
VERIFIEDYes
TOTAL WORKS6
TOTAL CITATIONS0
AUTHOR COUNT6
EDITOR COUNT0
FIRST PUBLICATION YEAR2022
LATEST PUBLICATION YEAR2025
H-INDEX0
  • Causal impact of gambling-related cognitive distortions on the severity of gambling disorder: A one-year multicenter longitudinal study in treatment-seeking patients in Japan

    Open Access•Yoshiki Koga, Moemi Shibasaki et al.•ARTICLE•Journal of Behavioral Addictions•2025

  • Does Video Game Play Elevate Suicide Risk? A Cross‐sectional Study of Japanese Young Adults 1 , 2

    Open Access•Yoshiki Koga, K Kawano et al.•ARTICLE•Japanese Psychological Research•2025

    The present study explored the relationship between video/online game playing and suicide risk among Japanese young adults using the interpersonal–psychological theory of suicide. A sample of 310 players aged 20–39 years was recruited through an Internet research company. Each participant completed a questionnaire containing items that measured time spent on games, game addiction (GA), game categories, suicidal ideation (SI), suicide attempt (SA)…

  • Attitudes Toward Digital Immortality and Related Factors Among Older Adults: An Exploratory Study From a Developmental Perspective

    Open Access•Daisuke Kawashima, Tomomi Kempe et al.•ARTICLE•OMEGA - Journal of Death and Dying•2025

    Recent advances in artificial intelligence-based resurrection technologies may impact our perspectives on life and death. However, empirical research on this subject is currently limited. Therefore, we investigated attitudes toward digital immortality and their association with psychosocial developmental features, such as ego-integrity and gerotranscendence, among Japanese older adults. A total of 296 older Japanese adults completed a questionnai…

  • Development and Initial Validation of the Death Attitudes in Relationships Scale

    Open Access•Daisuke Kawashima, Tomomi Kempe et al.•ARTICLE•Japanese Psychological Research•2024

    Relationships with close relatives, friends, and future generations should be critical in a collective society; therefore, the fear of separation from others, and care for others, must be core components of attitudes concerning death. However, such relational attitudes toward death have been insufficiently investigated. This study develops a new psychological scale for assessing death attitudes considering relationships with loved ones and future…

  • I Want My Loved One Back Virtually”: Exploring the Desire of Bereaved People to Create and Maintain Digital Bonds With Their Deceased Loved Ones

    Open Access•Daisuke Kawashima, Tomomi Kempe et al.•ARTICLE•OMEGA - Journal of Death and Dying•2023

    With the rapid development of digital technology in recent years, virtual funerals and the reproduction of deceased persons in digital spaces have become possible. However, few empirical studies have been conducted on this topic. This study assessed the attitudes of bereaved people toward digital bonds with their deceased relatives, and explored related factors. A survey was administered to bereaved, middle-aged Japanese citizens who had lost a f…

  • Feasibility of brief online gatekeeper training for Japanese university students: A randomized controlled trial

    Daisuke Kawashima, Yoshiki Koga et al.•ARTICLE•Death Studies•2022•References: 4

    Gatekeeper training for university students is a promising suicide prevention approach. However, there is a lack of comparative studies with control groups and the effectiveness of online gatekeeper training programs is unclear. We investigated the effectiveness of brief online gatekeeper training for Japanese university students. Participants were divided into two groups (training or control) and answered surveys at three time points (pretest, p…

No prominent works on this page.

  • Feasibility of brief online gatekeeper training for Japanese university students: A randomized controlled trial

    Daisuke Kawashima, Yoshiki Koga et al.•ARTICLE•Death Studies•2022•References: 4

    Gatekeeper training for university students is a promising suicide prevention approach. However, there is a lack of comparative studies with control groups and the effectiveness of online gatekeeper training programs is unclear. We investigated the effectiveness of brief online gatekeeper training for Japanese university students. Participants were divided into two groups (training or control) and answered surveys at three time points (pretest, p…

  • I Want My Loved One Back Virtually”: Exploring the Desire of Bereaved People to Create and Maintain Digital Bonds With Their Deceased Loved Ones

    Open Access•Daisuke Kawashima, Tomomi Kempe et al.•ARTICLE•OMEGA - Journal of Death and Dying•2023

    With the rapid development of digital technology in recent years, virtual funerals and the reproduction of deceased persons in digital spaces have become possible. However, few empirical studies have been conducted on this topic. This study assessed the attitudes of bereaved people toward digital bonds with their deceased relatives, and explored related factors. A survey was administered to bereaved, middle-aged Japanese citizens who had lost a f…

  • Development and Initial Validation of the Death Attitudes in Relationships Scale

    Open Access•Daisuke Kawashima, Tomomi Kempe et al.•ARTICLE•Japanese Psychological Research•2024

    Relationships with close relatives, friends, and future generations should be critical in a collective society; therefore, the fear of separation from others, and care for others, must be core components of attitudes concerning death. However, such relational attitudes toward death have been insufficiently investigated. This study develops a new psychological scale for assessing death attitudes considering relationships with loved ones and future…

  • Causal impact of gambling-related cognitive distortions on the severity of gambling disorder: A one-year multicenter longitudinal study in treatment-seeking patients in Japan

    Open Access•Yoshiki Koga, Moemi Shibasaki et al.•ARTICLE•Journal of Behavioral Addictions•2025

  • Does Video Game Play Elevate Suicide Risk? A Cross‐sectional Study of Japanese Young Adults 1 , 2

    Open Access•Yoshiki Koga, K Kawano et al.•ARTICLE•Japanese Psychological Research•2025

    The present study explored the relationship between video/online game playing and suicide risk among Japanese young adults using the interpersonal–psychological theory of suicide. A sample of 310 players aged 20–39 years was recruited through an Internet research company. Each participant completed a questionnaire containing items that measured time spent on games, game addiction (GA), game categories, suicidal ideation (SI), suicide attempt (SA)…

  • Attitudes Toward Digital Immortality and Related Factors Among Older Adults: An Exploratory Study From a Developmental Perspective

    Open Access•Daisuke Kawashima, Tomomi Kempe et al.•ARTICLE•OMEGA - Journal of Death and Dying•2025

    Recent advances in artificial intelligence-based resurrection technologies may impact our perspectives on life and death. However, empirical research on this subject is currently limited. Therefore, we investigated attitudes toward digital immortality and their association with psychosocial developmental features, such as ego-integrity and gerotranscendence, among Japanese older adults. A total of 296 older Japanese adults completed a questionnai…

Psychology (6 works) · Clinical Psychology (3 works) · Computer Science (3 works) · Psychiatry (3 works) · Social Psychology (3 works) · Addiction (2 works) · Child and Adolescent Psychosocial and Emotional Development (2 works) · Death Anxiety and Social Exclusion (2 works) · Developmental psychology (2 works) · Grief, Bereavement, and Mental Health (2 works)

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