心理的苦痛とメンタルヘルス医療の利用の 10 年の動向を解明~パンデミック前後で日本人のメンタルヘルスが二極化?~

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2025-10-21 東京大学

東京大学大学院医学系研究科の佐々木那津講師・西大輔教授らの研究チームは、厚生労働省「国民生活基礎調査」(2013〜2022年、約176万人分)を解析し、日本人の心理的苦痛とメンタルヘルス医療利用の10年間の変化を明らかにした。結果、パンデミック前(2019年)までは中等度・重度の苦痛とも横ばいだったが、2022年には中等度が減少(24.9→21.8%)、重度が増加(4.7→5.0%)する「二極化」が進行。特に18〜25歳女性と35〜49歳男性で重度苦痛の増加が顕著だった。医療利用率は10年間で3.1%から4.6%に上昇し、若年層での利用増が目立った。メンタルヘルスの悪化層と良好層の分断が示唆され、今後の精神保健政策に重要な知見を提供する。

心理的苦痛とメンタルヘルス医療の利用の 10 年の動向を解明~パンデミック前後で日本人のメンタルヘルスが二極化?~
新型コロナウイルス感染症パンデミック前後で日本人のメンタルヘルスが二極化

<関連情報>

日本における精神的苦痛とメンタルヘルスサービス利用動向(2013~2022年):COVID-19パンデミック前後の変化に焦点を当てて Psychological distress and mental health service use trends in Japan (2013–2022): Focusing on the change before and after the COVID-19 pandemic

Natsu Sasaki, Asuka Takae, Hiroki Asaoka, Naoaki Kuroda, Hiroshi Yatsuya, Nanami Nishio, Takahiro Tabuchi, Daisuke Nishi
Journal of Affective Disorders  Available online: 20 October 2025
DOI:https://doi.org/10.1016/j.jad.2025.120398

Highlights

  • Moderate distress declined from 25.52 % to 21.81 % (2013–2022).
  • High distress rose from 4.66 % to 5.02 % over the study period.
  • Men 35–49 and women 18–25 had the greatest rise in high distress.
  • Mental health visits increased, notably among young adults.
  • Women consistently showed higher distress and service use than men.

Abstract

This study investigated trends in psychological distress and mental health service use in Japan before and after the COVID-19 pandemic using nationally representative data from the Comprehensive Survey of Living Conditions (2013–2022). Psychological distress was assessed using the Japanese version of the Kessler 6 Scale, with scores of 5–12 indicating moderate distress and scores of ≥13 indicating high distress. Mental health service use was defined as regular visits to hospitals or clinics for depression or other psychological disorders. Analysis of data from 1,765,102 participants revealed that while the prevalence of moderate distress decreased from 24.9 % in 2019 to 21.8 % in 2022, the prevalence of high distress increased from 4.7 % to 5.0 % over the same period. Notably, increases in high distress were most prominent among aged 35–49 population. Cross-sectionally, women aged 26–34 showed highest prevalence of high distress (7.6 %). Additionally, mental health service use rose markedly, especially among young adults with high distress, with women consistently reporting higher distress and service utilization than men. These findings suggest a polarization in psychological distress in Japan, with a decline in moderate symptoms concurrent with a rise in severe distress, highlighting emerging gaps in mental health care. The results underscore the need for targeted interventions and the expansion of accessible, diverse mental health services to address unmet needs, particularly among vulnerable subgroups including young women and middle-aged population.

医療・健康
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