Hirokazu Tachikawa

Dr. Hirokazu Tachikawa

orcid

Research Focus & Metrics

Academic Career Length

25Years (2002-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 January 2018 in Journal of Affective Disorders
Verified
Journal Article
Closed access
TTTakaya Taguchi
Takaya Taguchi
HTHirokazu Tachikawa
Hirokazu Tachikawa
KNKiyotaka Nemoto
Kiyotaka Nemoto
MSMasayuki Suzuki
Masayuki Suzuki
TNToru Nagano
Toru Nagano
TATetsuaki Arai
Tetsuaki Arai

1 April 2015 in Journal of Affective Disorders
Verified
Journal Article
Closed access
MIMasatoshi Inagaki
Masatoshi Inagaki
YKYoshitaka Kawashima
Yoshitaka Kawashima
CKChiaki Kawanishi
Chiaki Kawanishi
NYNaohiro Yonemoto
Naohiro Yonemoto
TSTatsuya Sugimoto
Tatsuya Sugimoto
MYMitsuhiko Yamada
Mitsuhiko Yamada

10 February 2021 in PLOS ONE
Verified
Journal Article
Open access
PDF file
HMHaruhiko Midorikawa
Haruhiko Midorikawa
MAMiyuki Aiba
Miyuki Aiba
ALAdam Lebowitz
Adam Lebowitz
TTTakaya Taguchi
Takaya Taguchi
YSYuki Shiratori
Yuki Shiratori
HTHirokazu Tachikawa
Hirokazu Tachikawa
Assessing fear and anxiety regarding COVID-19 viral infection is essential for investigating mental health during this epidemic. We have developed and validated a Japanese-language version of The Fear of COVID-19 Scale (FCV-19S) based on a large, nationwide residential sample (n = 6,750) recruited through news and social media responding to an online version of the questionnaire. Data was collected from August 4–25, 2020. Results correlated with K6, GAD-7 and IES-R psychological scales, and T-tests and analysis of variance identified associated factors. All indices indicated the two-factor modelemotional fear reactionsandsymptomatic expressions of feara better fit for our data than a single-factor model in Confirmatory Factor Analysis (χ2= 164.16, p<0.001, CFI 0.991, TLI = 0.985, RMSEA = 0.043). Socio-demographic factors identified as disaster vulnerabilities such as female sex, sexual minority, elderly, unemployment, and present psychiatric history associated with higher scores. However, respondent or family member experience of infection risk, or work/school interference from confinement, had greatest impact. Results suggest necessity of mental health support during this pandemic similar to other disasters.

1 March 2022 in Psychiatry and Clinical Neurosciences
Verified
Journal Article
Open access
PDF file
YKYasuto Kunii
Yasuto Kunii
HUHitomi Usukura
Hitomi Usukura
KOKotaro Otsuka
Kotaro Otsuka
MMMasaharu Maeda
Masaharu Maeda
HYHirooki Yabe
Hirooki Yabe
HTHiroaki Tomita
Hiroaki Tomita
Post‐disaster mental health and psychosocial support have drawn attention in Japan after the 1995 Great Hanshin‐Awaji Earthquake, with mental health care centers for the affected communities being organized. After the catastrophe, a reconstruction budget was allocated to organize mental health care centers to provide psychosocial support for communities affected by the 2007 Chūetsu offshore earthquake, the 2011 Great East Japan Earthquake, and the 2016 Kumamoto Earthquake. There were several major improvements in post‐disaster mental health measures after the Great East Japan Earthquake. The Disaster Psychiatric Assistance Team system was organized after the earthquake to orchestrate disaster response related to the psychiatric health system and mental health of the affected communities. Special mental health care efforts were drawn to the communities affected by the nuclear power plant accident through Chemical, Biological, Radiological, Nuclear, and high yield Explosives, being succeeded by measures against the coronavirus pandemic. As another new movement after the Great East Japan Earthquake, the number of surveys involving communities affected by disasters has soared. More than 10 times the number of scientific publications were made in English during the decade following the Great East Japan Earthquake, compared with the previous decades. In this review, we examined the results and issues acquired in the 10 years since the Great East Japan Earthquake, proposing evidence‐based disaster psychiatry as the direction of future mental health measures related to emergency preparedness and response.

6 August 2021 in Psychiatry and Clinical Neurosciences
Verified
Journal Article
Open access
PDF file
YFYasuko Fuse‐Nagase
Yasuko Fuse‐Nagase
TMToshiyuki Marutani
Toshiyuki Marutani
HTHirokazu Tachikawa
Hirokazu Tachikawa
TITaku Iwami
Taku Iwami
YYYuji Yamamoto
Yuji Yamamoto
KYKatsuhiro Yasumi
Katsuhiro Yasumi
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5 June 2013 in International Journal of Social Psychiatry
Verified
Journal Article
Closed access
GEGo Endo
Go Endo
HTHirokazu Tachikawa
Hirokazu Tachikawa
YFYoshiharu Fukuoka
Yoshiharu Fukuoka
MAMiyuki Aiba
Miyuki Aiba
KNKiyotaka Nemoto
Kiyotaka Nemoto
TATakashi Asada
Takashi Asada
Background: The loss of social support is one of the major risk factors for suicide. However, there are few empirical studies that have examined how a person’s suicide ideation relates to their social support. Aims: To examine the relationship between social support and suicidal ideation. Methods: Self-report questionnaires were sent to 2,200 randomly selected adults in Japan. The questionnaire inquired the participants about the severity of suicidal ideation, the details of current perceived social support and their degree of satisfaction with this social support. Social support and related indicators were compared among three groups of participants that varied in severity of suicidal ideation. Results: People in the group that had suicide ideation during their lives reported receiving significantly less support from their family and had greater feelings of dissatisfaction with that support than those in the other groups. Furthermore, people who had suicide ideation during the month immediately preceding the survey reported providing less support to their family, relatives or friends, as well as receiving less support from family than other groups, and having stronger feelings of dissatisfaction with social support. Conclusion: Our study identified a strong relationship between the severity of suicidal ideation and perceived social support.