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Ichiro Kusumi

Biographic Data

ID7372410
NAMEIchiro Kusumi
GIVEN NAMESIchiro
FAMILY NAMEKusumi
SIGNATUREKUSUMI I
AFFILIATIONSHokkaido University
ORCID0000-0002-8747-5070
VERIFIEDYes
TOTAL WORKS16
TOTAL CITATIONS0
AUTHOR COUNT16
EDITOR COUNT0
FIRST PUBLICATION YEAR2017
LATEST PUBLICATION YEAR2025
H-INDEX0
  • The impact of the prolonged Covid-19 pandemic on the practice of psychosomatic medicine in Japan

    Open Access•Yukari Yamanaka, Kazuhiro Yoshiuchi et al.•ARTICLE•BioPsychoSocial Medicine•2025

    BACKGROUND: The prolonged COVID-19 pandemic has significantly affected the clinical care and the mental health of patients in psychosomatic medicine. Between late 2021 and early 2022, the Japanese Society of Psychosomatic Medicine (JSPM) and the Japanese Society of Psychosomatic Internal Medicine (JSPIM) conducted a nationwide physician survey to assess these effects. The survey identified difficulties in outpatient and inpatient care, increased …

  • A nationwide questionnaire survey of physicians regarding the impact of the Covid-19 pandemic on patients and treatment system of psychosomatic medicine

    Open Access•Yukari Yamanaka, Kazuhiro Yoshiuchi et al.•ARTICLE•BioPsychoSocial Medicine•2023

    BACKGROUND: The coronavirus disease 2019 (COVID-19) pandemic has affected the treatment system of medical institutions across the world. Studies of the populations and patients have reported mental health problems caused by the pandemic. However, there are few large-scale studies that have examined the effects of the COVID-19 on diseases from the perspective of psychosomatic medicine. The purpose of this study was to examine changes made to the p…

  • Neuroticism mediates the association between childhood abuse and the well-being of community dwelling adult volunteers

    Open Access•Yota Fujimura, Akiyoshi Shimura et al.•ARTICLE•BioPsychoSocial Medicine•2023

    BACKGROUND: Previous studies reported that the experience of maltreatment in childhood reduces subjective well-being in adulthood and that neuroticism is negatively associated with subjective well-being. However, the interrelationship between childhood maltreatment, adult life events, neuroticism, and subjective well-being has not been analyzed to date. METHODS: A total of 404 adult volunteers provided responses to the following questionnaires: 1…

  • Relationship between self-esteem and suicidal ideation before and during Covid-19 in a non-clinical sample

    Open Access•Dat Tan Nguyen, Nobuyuki Mitsui et al.•ARTICLE•Frontiers in Psychiatry•2023

    The finding suggested that self-esteem, hopelessness, and psychological distress could help elucidate the development of suicidal ideation. Clinicians may target these factors in suicide prevention programs, particularly in the settings of the COVID-19 pandemic or future crisis

  • Roles of childhood maltreatment, personality traits, and life stress in the prediction of severe premenstrual symptoms

    Open Access•Chihiro Morishita, Takeshi Inoue et al.•ARTICLE•BioPsychoSocial Medicine•2022

    BACKGROUND: About 3% to 8% of women of fertile age are thought to have premenstrual dysphoric disorder (PMDD), which is regarded as a serious form of premenstrual syndrome (PMS), although the details of this common condition remain unclear. The aim of this study was to analyze the interrelations of childhood maltreatment, personality traits, and life stress in the etiology of PMS/PMDD. METHODS: A total of 240 adult female volunteers from a commun…

  • Symptom Patterns of the Occurrence of Depression and Anxiety in a Japanese General Adult Population Sample

    Open Access•Huijie Lei, Chong Chen et al.•ARTICLE•Frontiers in Psychiatry•2022

    To our knowledge, this is the first latent class analysis that examined the symptom patterns of depression and anxiety in Asian subjects. The classes we identified have distinct features that confirm their unique patterns of symptom endorsement. Our findings may provide insights into the etiology of depression, anxiety, and their comorbidity

  • Effects of the Interaction between Affective Temperaments and BIS/BAS on Depressive Symptoms in Individuals with Major Depressive Disorder

    Open Access•Kuniyoshi Toyoshima, Jiro Masuya et al.•ARTICLE•International Journal of…•2022

    Depressive symptoms (DepS) associated with major depressive disorder (MDD) are influenced by affective temperaments (ATs), behavioral inhibition system (BIS), and behavioral activation system (BAS). However, the effect of interactions between ATs and BIS/BAS on DepS in MDD remains poorly understood. Herein, we aimed to investigate the effects of these interactions. The Temperament Evaluation of Memphis, Pisa, Paris, and San Diego Auto-questionnai…

  • Cognitive complaints mediate the influence of sleep disturbance and state anxiety on subjective well-being and ill-being in adult community volunteers

    Open Access•Kuniyoshi Toyoshima, Masahiko Ichiki et al.•ARTICLE•BMC Public Health•2022

    This study suggests that CCs mediate the associations of sleep disturbance and state anxiety with SWB and SIB, respectively, in adult community volunteers. To address SWB and SIB associated with sleep disturbance and state anxiety, evaluating CCs may be useful in public mental health. Our findings will encourage health care workers to assess CCs more systematically. Future studies may need to target CCs to develop interventions for SWB and SIB

  • Subjective cognitive impairment and presenteeism mediate the associations of rumination with subjective well-being and ill-being in Japanese adult workers from the community

    Open Access•Kuniyoshi Toyoshima, Masahiko Ichiki et al.•ARTICLE•BioPsychoSocial Medicine•2021

    BACKGROUND: In recent years, the roles of rumination, subjective cognitive impairment (SCI), and presenteeism have been emphasized in occupational mental health. However, associations between rumination, SCI, presenteeism, and psychological well-being are not fully understood. We hypothesized that SCI and presenteeism mediate the associations between rumination and subjective well-being (SWB) and subjective ill-being (SIB). Hence, we investigated…

  • Associations of Cognitive Complaints and Depressive Symptoms with Health-Related Quality of Life and Perceived Overall Health in Japanese Adult Volunteers

    Open Access•Kuniyoshi Toyoshima, Takeshi Inoue et al.•ARTICLE•International Journal of…•2021

    Cognitive complaints, defined as perceived cognitive dysfunction in daily living, are associated with depressive symptoms. The associations of cognitive complaints and depressive symptoms with health-related quality of life (HRQoL) and perceived overall health in Japanese adults remains unknown. To investigate these relationships, we evaluated a convenience sample of 525 Japanese adult volunteers (Mage: 41.3 ± 11.7; 238 male and 287 female). We u…

  • Mediating Roles of Cognitive Complaints on Relationships between Insomnia, State Anxiety, and Presenteeism in Japanese Adult Workers

    Open Access•Kuniyoshi Toyoshima, Takeshi Inoue et al.•ARTICLE•International Journal of…•2021

    Complaints of cognitive functions (CCFs), defined as subjective cognitive dysfunction, affect social function; additionally, for workers, this condition is an important factor in presenteeism and mediates the effect of depressive symptoms on presenteeism. This study aimed to investigate whether CCFs mediate the relationships among insomnia, state anxiety (SA), and presenteeism. Participants were 471 Japanese adult workers evaluated using the Athe…

  • Personality traits mediate the association between perceived parental bonding and well-being in adult volunteers from the community

    Open Access•Akiko Murakoshi, Nobuyuki Mitsui et al.•ARTICLE•BioPsychoSocial Medicine•2020

    BACKGROUND: Previous studies reported that subjective well-being in adulthood correlates with perceived parental bonding in childhood as well as personality traits. However, whether personality traits mediate the effect of perceived parental bonding on well-being or not has not been reported to date. In this study, we hypothesized that 'parental care and overprotection' in childhood affect 'well-being' in adulthood through various 'personality tr…

  • Associations between the depressive symptoms, subjective cognitive function, and presenteeism of Japanese adult workers

    Open Access•Kuniyoshi Toyoshima, Takeshi Inoue et al.•ARTICLE•BioPsychoSocial Medicine•2020

    BACKGROUND: Presenteeism has attracted much attention in the research into mental health. However, how cognitive complaints and depressive symptoms affect presenteeism remains unknown. Therefore, this study examined the correlation between subjective cognitive impairment, depressive symptoms, and work limitations. METHODS: We collected data from 477 adult workers in Japan. We evaluated subjective cognitive function using the Cognitive Complaints …

  • Controlling the laxative abuse of anorexia nervosa patients with the Serigaya Methamphetamine Relapse Prevention Program workbook

    Open Access•Kuniyoshi Toyoshima, Ichiro Kusumi•ARTICLE•BioPsychoSocial Medicine•2019

    BACKGROUND: There is no consensus on effective treatment for laxative abuse in patients with eating disorders. Here, we report the case of a patient with laxative abuse who showed some improvement through an intervention based on the Matrix model. CASE PRESENTATION: A woman diagnosed with anorexia nervosa-binge eating/purging type (AN-BP) steadfastly denied laxative abuse and would not admit to suffering from an eating disorder. This led to low m…

  • Analysis of the Influence of microRNAs in Lithium Response in Bipolar Disorder

    Open Access•Céline S Reinbold, Andreas J Forstner et al.•ARTICLE•Frontiers in Psychiatry•2018

    Bipolar disorder (BD) is a common, highly heritable neuropsychiatric disease characterized by recurrent episodes of mania and depression. Lithium is the best-established long-term treatment for BD, even though individual response is highly variable. Evidence suggests that some of this variability has a genetic basis. This is supported by the largest genome-wide association study (GWAS) of lithium response to date conducted by the International Co…

  • Verbal Memory Impairment in Patients with Subsyndromal Bipolar Disorder

    Open Access•Tomiki Sumiyoshi, Atsuhito Toyomaki et al.•ARTICLE•Frontiers in Psychiatry•2017

    These results suggest the CVLT-II Japanese version is able to discriminate between bipolar disorder patients and healthy controls with good sensitivity and validity. Data in this study also indicate that the degree of verbal memory deficits in bipolar disorder may be influenced by memory organizational strategy

No prominent works on this page.

  • Verbal Memory Impairment in Patients with Subsyndromal Bipolar Disorder

    Open Access•Tomiki Sumiyoshi, Atsuhito Toyomaki et al.•ARTICLE•Frontiers in Psychiatry•2017

    These results suggest the CVLT-II Japanese version is able to discriminate between bipolar disorder patients and healthy controls with good sensitivity and validity. Data in this study also indicate that the degree of verbal memory deficits in bipolar disorder may be influenced by memory organizational strategy

  • Analysis of the Influence of microRNAs in Lithium Response in Bipolar Disorder

    Open Access•Céline S Reinbold, Andreas J Forstner et al.•ARTICLE•Frontiers in Psychiatry•2018

    Bipolar disorder (BD) is a common, highly heritable neuropsychiatric disease characterized by recurrent episodes of mania and depression. Lithium is the best-established long-term treatment for BD, even though individual response is highly variable. Evidence suggests that some of this variability has a genetic basis. This is supported by the largest genome-wide association study (GWAS) of lithium response to date conducted by the International Co…

  • Controlling the laxative abuse of anorexia nervosa patients with the Serigaya Methamphetamine Relapse Prevention Program workbook

    Open Access•Kuniyoshi Toyoshima, Ichiro Kusumi•ARTICLE•BioPsychoSocial Medicine•2019

    BACKGROUND: There is no consensus on effective treatment for laxative abuse in patients with eating disorders. Here, we report the case of a patient with laxative abuse who showed some improvement through an intervention based on the Matrix model. CASE PRESENTATION: A woman diagnosed with anorexia nervosa-binge eating/purging type (AN-BP) steadfastly denied laxative abuse and would not admit to suffering from an eating disorder. This led to low m…

  • Personality traits mediate the association between perceived parental bonding and well-being in adult volunteers from the community

    Open Access•Akiko Murakoshi, Nobuyuki Mitsui et al.•ARTICLE•BioPsychoSocial Medicine•2020

    BACKGROUND: Previous studies reported that subjective well-being in adulthood correlates with perceived parental bonding in childhood as well as personality traits. However, whether personality traits mediate the effect of perceived parental bonding on well-being or not has not been reported to date. In this study, we hypothesized that 'parental care and overprotection' in childhood affect 'well-being' in adulthood through various 'personality tr…

  • Associations between the depressive symptoms, subjective cognitive function, and presenteeism of Japanese adult workers

    Open Access•Kuniyoshi Toyoshima, Takeshi Inoue et al.•ARTICLE•BioPsychoSocial Medicine•2020

    BACKGROUND: Presenteeism has attracted much attention in the research into mental health. However, how cognitive complaints and depressive symptoms affect presenteeism remains unknown. Therefore, this study examined the correlation between subjective cognitive impairment, depressive symptoms, and work limitations. METHODS: We collected data from 477 adult workers in Japan. We evaluated subjective cognitive function using the Cognitive Complaints …

  • Subjective cognitive impairment and presenteeism mediate the associations of rumination with subjective well-being and ill-being in Japanese adult workers from the community

    Open Access•Kuniyoshi Toyoshima, Masahiko Ichiki et al.•ARTICLE•BioPsychoSocial Medicine•2021

    BACKGROUND: In recent years, the roles of rumination, subjective cognitive impairment (SCI), and presenteeism have been emphasized in occupational mental health. However, associations between rumination, SCI, presenteeism, and psychological well-being are not fully understood. We hypothesized that SCI and presenteeism mediate the associations between rumination and subjective well-being (SWB) and subjective ill-being (SIB). Hence, we investigated…

  • Associations of Cognitive Complaints and Depressive Symptoms with Health-Related Quality of Life and Perceived Overall Health in Japanese Adult Volunteers

    Open Access•Kuniyoshi Toyoshima, Takeshi Inoue et al.•ARTICLE•International Journal of…•2021

    Cognitive complaints, defined as perceived cognitive dysfunction in daily living, are associated with depressive symptoms. The associations of cognitive complaints and depressive symptoms with health-related quality of life (HRQoL) and perceived overall health in Japanese adults remains unknown. To investigate these relationships, we evaluated a convenience sample of 525 Japanese adult volunteers (Mage: 41.3 ± 11.7; 238 male and 287 female). We u…

  • Mediating Roles of Cognitive Complaints on Relationships between Insomnia, State Anxiety, and Presenteeism in Japanese Adult Workers

    Open Access•Kuniyoshi Toyoshima, Takeshi Inoue et al.•ARTICLE•International Journal of…•2021

    Complaints of cognitive functions (CCFs), defined as subjective cognitive dysfunction, affect social function; additionally, for workers, this condition is an important factor in presenteeism and mediates the effect of depressive symptoms on presenteeism. This study aimed to investigate whether CCFs mediate the relationships among insomnia, state anxiety (SA), and presenteeism. Participants were 471 Japanese adult workers evaluated using the Athe…

  • Roles of childhood maltreatment, personality traits, and life stress in the prediction of severe premenstrual symptoms

    Open Access•Chihiro Morishita, Takeshi Inoue et al.•ARTICLE•BioPsychoSocial Medicine•2022

    BACKGROUND: About 3% to 8% of women of fertile age are thought to have premenstrual dysphoric disorder (PMDD), which is regarded as a serious form of premenstrual syndrome (PMS), although the details of this common condition remain unclear. The aim of this study was to analyze the interrelations of childhood maltreatment, personality traits, and life stress in the etiology of PMS/PMDD. METHODS: A total of 240 adult female volunteers from a commun…

  • Symptom Patterns of the Occurrence of Depression and Anxiety in a Japanese General Adult Population Sample

    Open Access•Huijie Lei, Chong Chen et al.•ARTICLE•Frontiers in Psychiatry•2022

    To our knowledge, this is the first latent class analysis that examined the symptom patterns of depression and anxiety in Asian subjects. The classes we identified have distinct features that confirm their unique patterns of symptom endorsement. Our findings may provide insights into the etiology of depression, anxiety, and their comorbidity

  • Effects of the Interaction between Affective Temperaments and BIS/BAS on Depressive Symptoms in Individuals with Major Depressive Disorder

    Open Access•Kuniyoshi Toyoshima, Jiro Masuya et al.•ARTICLE•International Journal of…•2022

    Depressive symptoms (DepS) associated with major depressive disorder (MDD) are influenced by affective temperaments (ATs), behavioral inhibition system (BIS), and behavioral activation system (BAS). However, the effect of interactions between ATs and BIS/BAS on DepS in MDD remains poorly understood. Herein, we aimed to investigate the effects of these interactions. The Temperament Evaluation of Memphis, Pisa, Paris, and San Diego Auto-questionnai…

  • Cognitive complaints mediate the influence of sleep disturbance and state anxiety on subjective well-being and ill-being in adult community volunteers

    Open Access•Kuniyoshi Toyoshima, Masahiko Ichiki et al.•ARTICLE•BMC Public Health•2022

    This study suggests that CCs mediate the associations of sleep disturbance and state anxiety with SWB and SIB, respectively, in adult community volunteers. To address SWB and SIB associated with sleep disturbance and state anxiety, evaluating CCs may be useful in public mental health. Our findings will encourage health care workers to assess CCs more systematically. Future studies may need to target CCs to develop interventions for SWB and SIB

  • A nationwide questionnaire survey of physicians regarding the impact of the Covid-19 pandemic on patients and treatment system of psychosomatic medicine

    Open Access•Yukari Yamanaka, Kazuhiro Yoshiuchi et al.•ARTICLE•BioPsychoSocial Medicine•2023

    BACKGROUND: The coronavirus disease 2019 (COVID-19) pandemic has affected the treatment system of medical institutions across the world. Studies of the populations and patients have reported mental health problems caused by the pandemic. However, there are few large-scale studies that have examined the effects of the COVID-19 on diseases from the perspective of psychosomatic medicine. The purpose of this study was to examine changes made to the p…

  • Neuroticism mediates the association between childhood abuse and the well-being of community dwelling adult volunteers

    Open Access•Yota Fujimura, Akiyoshi Shimura et al.•ARTICLE•BioPsychoSocial Medicine•2023

    BACKGROUND: Previous studies reported that the experience of maltreatment in childhood reduces subjective well-being in adulthood and that neuroticism is negatively associated with subjective well-being. However, the interrelationship between childhood maltreatment, adult life events, neuroticism, and subjective well-being has not been analyzed to date. METHODS: A total of 404 adult volunteers provided responses to the following questionnaires: 1…

  • Relationship between self-esteem and suicidal ideation before and during Covid-19 in a non-clinical sample

    Open Access•Dat Tan Nguyen, Nobuyuki Mitsui et al.•ARTICLE•Frontiers in Psychiatry•2023

    The finding suggested that self-esteem, hopelessness, and psychological distress could help elucidate the development of suicidal ideation. Clinicians may target these factors in suicide prevention programs, particularly in the settings of the COVID-19 pandemic or future crisis

  • The impact of the prolonged Covid-19 pandemic on the practice of psychosomatic medicine in Japan

    Open Access•Yukari Yamanaka, Kazuhiro Yoshiuchi et al.•ARTICLE•BioPsychoSocial Medicine•2025

    BACKGROUND: The prolonged COVID-19 pandemic has significantly affected the clinical care and the mental health of patients in psychosomatic medicine. Between late 2021 and early 2022, the Japanese Society of Psychosomatic Medicine (JSPM) and the Japanese Society of Psychosomatic Internal Medicine (JSPIM) conducted a nationwide physician survey to assess these effects. The survey identified difficulties in outpatient and inpatient care, increased …

Psychiatry (15 works) · Clinical Psychology (12 works) · Medicine (12 works) · Psychology (12 works) · Clinical Psychology (7 works) · Cognition (6 works) · Anxiety (5 works) · Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes (4 works) · Internal Medicine (4 works) · Personality (4 works)

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