Takafumi Ogawa, Yuki Shiratori, Haruhiko Midorikawa, Miyuki Aiba, Daichi Sugawara, Naoaki Kawakami, Tetsuaki Arai, Hirokazu Tachikawa. A Survey of Changes in the Psychological State of Individuals with Social Withdrawal (hikikomori) in the Context of the COVID Pandemic. COVID. 2023. 3. 8. 1158-1172
Hirokazu Tachikawa, Midori Matsushima, Haruhiko Midorikawa, Miyuki Aiba, Ryo Okubo, Takahiro Tabuchi. Impact of loneliness on suicidal ideation during the COVID-19 pandemic: findings from a cross-sectional online survey in Japan. BMJ open. 2023. 13. 5. e063363
Haruhiko Midorikawa, Hirokazu Tachikawa, Miyuki Aiba, Yuki Shiratori, Daichi Sugawara, Naoaki Kawakami, Ryo Okubo, Takahiro Tabuchi. Proposed Cut-Off Score for the Japanese Version of the Fear of Coronavirus Disease 2019 Scale (FCV-19S): Evidence from a Large-Scale National Survey in Japan. International journal of environmental research and public health. 2022. 20. 1
Noriko Sodeyama, Sho Takahashi, Miyuki Aiba, Yayoi Haraguchi, Tetsuaki Arai, Hirokazu Tachikawa. A Comparison of Mental Health among Earthquake, Tsunami, and Nuclear Power Plant Accident Survivors in the Long Term after the Great East Japan Earthquake. International journal of environmental research and public health. 2022. 19. 21
Aiba, M, Tachikawa, H, Watanabe, T, Midorikawa, H, Yoshida, K, Arai, T, Tamiya, N. Relationship between support for the elderly and healthy life expectancy: From the national longitudinal survey. The 6th International Conference of Global Aging Tsukuba. 2018