The survey was conducted at medical facilities on one designated date set for each institution from three days in October.
The number of patients refers to those who were continuously receiving medical treatment (including those who did not receive medical treatment at medical institutions on the dates of the survey) calculated by the following formula:
number of patients receiving medical treatment = estimated number of inpatients + estimated number of initial visit outpatients + (estimated number of return visit outpatients × average interval since last visit × adjustment factor (6/7))
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Number of patients with mental and behavioral disorders Japan 2023, by classification
As of October 2023, there were over thousand inpatients and outpatients receiving treatments for mental and behavioral disorders in Japan. The majority were treated for *** in that year.
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MHLW (Japan). (May 27, 2025). Number of patients receiving treatments for mental and behavioral disorders in Japan in 2023, by disease classification (in 1,000s) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 26, 2026, from /statistics/1279408/japan-number-patients-mental-behavioral-disorders-by-disease-classification/
MHLW (Japan). "Number of patients receiving treatments for mental and behavioral disorders in Japan in 2023, by disease classification (in 1,000s)." Chart. May 27, 2025. ÌÇÐÄÆƽâ°æ. Accessed July 26, 2026. /statistics/1279408/japan-number-patients-mental-behavioral-disorders-by-disease-classification/
MHLW (Japan). (2025). Number of patients receiving treatments for mental and behavioral disorders in Japan in 2023, by disease classification (in 1,000s). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 26, 2026. /statistics/1279408/japan-number-patients-mental-behavioral-disorders-by-disease-classification/
MHLW (Japan). "Number of Patients Receiving Treatments for Mental and Behavioral Disorders in Japan in 2023, by Disease Classification (in 1,000s)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 27 May 2025, /statistics/1279408/japan-number-patients-mental-behavioral-disorders-by-disease-classification/
MHLW (Japan), Number of patients receiving treatments for mental and behavioral disorders in Japan in 2023, by disease classification (in 1,000s) ÌÇÐÄÆƽâ°æ, /statistics/1279408/japan-number-patients-mental-behavioral-disorders-by-disease-classification/ (last visited July 26, 2026)
Number of patients receiving treatments for mental and behavioral disorders in Japan in 2023, by disease classification (in 1,000s) [Graph], MHLW (Japan), May 27, 2025. [Online]. Available: /statistics/1279408/japan-number-patients-mental-behavioral-disorders-by-disease-classification/
