Japan
Is THCA Legal in Japan?
Status
Illegal
Covers
Jurisdiction
Last updated
August 6, 2026
The short answer
THCA is illegal in Japan under the country's revised Cannabis Control Act (2024). Japan revised its Cannabis Control Act in late 2023-2024, expanding the ban to explicitly cover psychoactive hemp derivatives including THCA. Japan now uses an ingredient-based standard — meaning any product containing psychoactive cannabinoids, regardless of hemp or marijuana origin, is subject to drug control laws. THCA flower is illegal because it converts to intoxicating THC when heated.
Since December 12, 2024, THC has been controlled as a narcotic under the Narcotics and Psychotropics Control Act, and Japan added a use offense — possession or use of cannabis or THC products can now carry up to 7 years' imprisonment. Japan's enforcement is among the strictest in the world for cannabis-related substances. CBD products are no longer held to a zero-detectable-THC standard; instead they must meet strict residual THC limits set under the revised framework — 10 mg/kg (10 ppm) for oils and powders, 1 mg/kg for solid products such as edibles and e-cigarette cartridges, and 0.1 mg/kg for beverages. Products exceeding these limits are treated as narcotics.
Last reviewed: August 6, 2026.
Related rules for Japan: Is Weed Legal in Japan? · Is CBD Legal in Japan? · Is Hemp Legal in Japan?
Key facts ·
Japan
Key facts
Rules at a glance
THC limit
THC is a controlled narcotic. CBD residual THC limits: 10 mg/kg oils/powders; 1 mg/kg solids; 0.1 mg/kg beverages.
Regulator
Ministry of Health, Labour and Welfare (MHLW)
Key regulation
Revised Cannabis Control Act (2024); Narcotics and Psychotropics Control Act
Effective
December 12, 2024
Adult-use cannabis
Illegal
Medical cannabis
Limited
For brands and importers
Import and export rules
Import of THCA or any psychoactive hemp derivative into Japan is a serious criminal offense. Hemp CBD products must meet Japan's residual THC limits — 10 mg/kg for oils and powders, 1 mg/kg for solid products, and 0.1 mg/kg for beverages — rather than the 0.3% delta-9 standard used in the US. Brands shipping to Japan must obtain product-specific clearance and lab testing under Japan's ingredient-based standard before any shipment.
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