1996 to 2023; as of one day in October of each year
Supplementary notes
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.
Citation formats
Number of patients with mental and behavioral disorders Japan 1996-2023, by type
As of October 2023, there were over ** patients in a day with mental or behavioral disorders in Japan. Around ** of them with schizophrenia, schizotypal personality disorder, or delusional disorder.Â
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MHLW (Japan). (June 30, 2025). Estimated number of patients per day with mental and behavioral disorders in Japan from 1996 to 2023, by illness type (in 1,000s) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 26, 2026, from /statistics/1270129/japan-number-patients-mental-behavioral-disorders-by-type/
MHLW (Japan). "Estimated number of patients per day with mental and behavioral disorders in Japan from 1996 to 2023, by illness type (in 1,000s)." Chart. June 30, 2025. ÌÇÐÄÆƽâ°æ. Accessed July 26, 2026. /statistics/1270129/japan-number-patients-mental-behavioral-disorders-by-type/
MHLW (Japan). (2025). Estimated number of patients per day with mental and behavioral disorders in Japan from 1996 to 2023, by illness type (in 1,000s). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 26, 2026. /statistics/1270129/japan-number-patients-mental-behavioral-disorders-by-type/
MHLW (Japan). "Estimated Number of Patients per Day with Mental and Behavioral Disorders in Japan from 1996 to 2023, by Illness Type (in 1,000s)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 30 Jun 2025, /statistics/1270129/japan-number-patients-mental-behavioral-disorders-by-type/
MHLW (Japan), Estimated number of patients per day with mental and behavioral disorders in Japan from 1996 to 2023, by illness type (in 1,000s) ÌÇÐÄÆƽâ°æ, /statistics/1270129/japan-number-patients-mental-behavioral-disorders-by-type/ (last visited July 26, 2026)
Estimated number of patients per day with mental and behavioral disorders in Japan from 1996 to 2023, by illness type (in 1,000s) [Graph], MHLW (Japan), June 30, 2025. [Online]. Available: /statistics/1270129/japan-number-patients-mental-behavioral-disorders-by-type/
