*The survey was conducted among 221 psychiatric facilities across Japan. Attending doctors of 2,468 patients who received inpatient or outpatient treatments at respective facilities responded to the survey question.
Patients were diagnosed with mental and behavioral disorders due to psychoactive substance use, excluding alcohol use, based on the International Classification of Diseases, Tenth Revision (ICD-10-CM) designated by the World Health Organization (WHO.)
**Including antitussive agent, drug for the common cold, analgesic, sleeping pill, etc.
For prescription drugs and medicines, the patients used (abused) them for non-treatment purposes.
Missing percentage points to 100 percent are probably due to rounding.
Citation formats
Breakdown of drug-dependent patients based on main drug use Japan 2024
According to a survey conducted from September to October 2024 in Japan, around **** percent of over 2,700 patients with mental disorders related to drug abuse were dependent mainly on . ** were the main reason for becoming drug-dependent for **** percent of patients treated at psychiatric facilities.
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National Institute of Mental Health. (June 30, 2025). Distribution of patients with drug abuse-related mental and behavioral disorders based on the mainly-dependent drug in Japan in 2024 [Graph]. In ÌÇÐÄÆÆ½â°æ. Retrieved July 20, 2026, from /statistics/1277708/japan-breakdown-drug-dependent-patients-main-drug-use/
National Institute of Mental Health. "Distribution of patients with drug abuse-related mental and behavioral disorders based on the mainly-dependent drug in Japan in 2024." Chart. June 30, 2025. ÌÇÐÄÆÆ½â°æ. Accessed July 20, 2026. /statistics/1277708/japan-breakdown-drug-dependent-patients-main-drug-use/
National Institute of Mental Health. (2025). Distribution of patients with drug abuse-related mental and behavioral disorders based on the mainly-dependent drug in Japan in 2024. ÌÇÐÄÆÆ½â°æ. ÌÇÐÄÆÆ½â°æ Inc.. Accessed: July 20, 2026. /statistics/1277708/japan-breakdown-drug-dependent-patients-main-drug-use/
National Institute of Mental Health. "Distribution of Patients with Drug Abuse-related Mental and Behavioral Disorders Based on The Mainly-dependent Drug in Japan in 2024." ÌÇÐÄÆÆ½â°æ, ÌÇÐÄÆÆ½â°æ Inc., 30 Jun 2025, /statistics/1277708/japan-breakdown-drug-dependent-patients-main-drug-use/
National Institute of Mental Health, Distribution of patients with drug abuse-related mental and behavioral disorders based on the mainly-dependent drug in Japan in 2024 ÌÇÐÄÆÆ½â°æ, /statistics/1277708/japan-breakdown-drug-dependent-patients-main-drug-use/ (last visited July 20, 2026)
Distribution of patients with drug abuse-related mental and behavioral disorders based on the mainly-dependent drug in Japan in 2024 [Graph], National Institute of Mental Health, June 30, 2025. [Online]. Available: /statistics/1277708/japan-breakdown-drug-dependent-patients-main-drug-use/