Last verified: March 2026

Country-by-Country Comparison

The following table summarizes cannabis laws across major Asian countries as of March 2026. Click on linked country names for more detailed analysis where available.

Japan Mirrors South Korea's Approach

Among developed Asian nations, Japan's cannabis policy most closely resembles South Korea's. Both countries share several key characteristics:

• Zero tolerance: Both countries prosecute cannabis offenses without minimum quantity thresholds.
• Extraterritorial application: Both Japan and South Korea assert the right to prosecute citizens for drug offenses committed abroad — even in countries where cannabis is legal. South Korea has actually prosecuted returning citizens for cannabis use in Canada.
• Urine testing as evidence: Both countries use positive drug tests as evidence of the crime of "use."
• Celebrity crackdowns: Both countries subject celebrities to massive public shaming campaigns following drug arrests, with careers permanently destroyed.
• Narrow medical exceptions: South Korea approved limited medical cannabis imports in 2018 (primarily Epidiolex for epilepsy). Japan opened a similar pharmaceutical pathway in 2024. Neither country has dispensaries or medical cards.
• High conviction rates: Both justice systems feature conviction rates exceeding 99%, with heavy reliance on confessions obtained during extended detention.

South Korea actively enforces its extraterritorial drug laws. In 2019, Korean authorities investigated returning citizens who had used cannabis legally in Canada, using social media monitoring and tip lines to identify suspects.

Korea Herald — Drug Enforcement Reports, 2019-2024

Thailand's Reversal: A Cautionary Tale

Thailand's brief experiment with cannabis liberalization — and its rapid reversal — offers important lessons for understanding Asian drug policy.

The Experiment (2022-2025)

In June 2022, Thailand became the first Asian country to effectively decriminalize cannabis, removing it from the narcotics schedule. Cannabis shops opened rapidly across Bangkok, Chiang Mai, and tourist areas. By 2023, an estimated 6,000+ cannabis businesses were operating.

The Backlash

The liberalization generated intense backlash. Critics pointed to:

• Unregulated recreational use, despite the government's stated intent to limit cannabis to medical and wellness purposes
• Concerns about youth access and normalization
• Cannabis tourism overwhelming certain areas
• Lack of regulatory framework leading to quality and safety concerns
• Diplomatic pressure from neighboring countries with strict anti-drug policies

Re-Criminalization (2025)

In 2025, Thailand's government moved to re-criminalize recreational cannabis, restoring criminal penalties for non-medical use. The reversal left thousands of businesses in limbo and demonstrated that cannabis liberalization is far from irreversible — particularly in Asia, where cultural attitudes and regional political dynamics create strong pressure toward prohibition.

The Broader Asian Context

Asia's restrictive approach to cannabis reflects deeply rooted historical, cultural, and political factors:

• Colonial-era drug laws: Many Asian drug laws trace back to colonial-era opium regulations, creating a deep institutional framework of prohibition.
• ASEAN cooperation: Southeast Asian nations have a history of coordinated anti-drug policies through ASEAN, creating mutual pressure to maintain strict enforcement.
• Cultural values: Collectivist social values in East Asian societies tend to view drug use as a threat to social order and family honor, not just individual health.
• Political utility: Drug enforcement serves as a tool of political control in some Asian states, with harsh penalties functioning as a deterrent and symbol of governmental authority.

For the foreseeable future, Asia will remain a continent where cannabis carries severe legal risks. Japanese travelers should approach cannabis laws in any Asian destination with the assumption that penalties are harsh and enforcement is active. For more on Japan's specific enforcement approach, see our Penalties & Enforcement page.