The survey was conducted at medical facilities on one designated date set for each institution from three days in October.
The estimated number of patients refers to the number of patients who received treatments at medical facilities on the surveyed day. It excludes the number of returning outpatients who were not treated during that period.
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Number of patients with mental disorders Japan 2023, by age and patient type
As of October 2023, there were around ** patients in a day in Japan aged *** years with mental and behavioral disorders, the highest number among age cohorts. The number of outpatients was slightly higher than the number of inpatients for that age group.
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MHLW (Japan). (June 30, 2025). Estimated number of patients per day with mental and behavioral disorders in Japan in October 2023, by age group and patient type (in 1,000s) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 31, 2026, from /statistics/1270283/japan-number-patients-mental-behavioral-disorders-by-age-and-patient-type/
MHLW (Japan). "Estimated number of patients per day with mental and behavioral disorders in Japan in October 2023, by age group and patient type (in 1,000s)." Chart. June 30, 2025. ÌÇÐÄÆƽâ°æ. Accessed July 31, 2026. /statistics/1270283/japan-number-patients-mental-behavioral-disorders-by-age-and-patient-type/
MHLW (Japan). (2025). Estimated number of patients per day with mental and behavioral disorders in Japan in October 2023, by age group and patient type (in 1,000s). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 31, 2026. /statistics/1270283/japan-number-patients-mental-behavioral-disorders-by-age-and-patient-type/
MHLW (Japan). "Estimated Number of Patients per Day with Mental and Behavioral Disorders in Japan in October 2023, by Age Group and Patient Type (in 1,000s)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 30 Jun 2025, /statistics/1270283/japan-number-patients-mental-behavioral-disorders-by-age-and-patient-type/
MHLW (Japan), Estimated number of patients per day with mental and behavioral disorders in Japan in October 2023, by age group and patient type (in 1,000s) ÌÇÐÄÆƽâ°æ, /statistics/1270283/japan-number-patients-mental-behavioral-disorders-by-age-and-patient-type/ (last visited July 31, 2026)
Estimated number of patients per day with mental and behavioral disorders in Japan in October 2023, by age group and patient type (in 1,000s) [Graph], MHLW (Japan), June 30, 2025. [Online]. Available: /statistics/1270283/japan-number-patients-mental-behavioral-disorders-by-age-and-patient-type/
