Japan

What betting is permitted in Japan

Japan’s Penal Code generally prohibits gambling, with limited activities authorised by separate legislation. Lawful options include the official public competitions—horse racing, bicycle racing, motorboat racing and motorcycle racing—and the sports-promotion lottery commonly known as toto. Use only the official operator or verified sales channel for each product.

A commercial online casino or ordinary offshore sportsbook does not become legal because it holds a foreign licence. Government and police guidance is explicit: gambling on an overseas online casino while physically in Japan is a crime. This includes casino-style games and unauthorised online sports betting.

Advertising and mirror-site risks

Rules effective from September 2025 also prohibit presenting illegal online-gambling sites or apps to people in Japan and publishing information that directs them to those services. Japanese-language affiliate pages, livestreams, app-store listings and changing mirror domains are therefore not proof of legitimacy.

• Do not use a VPN or overseas registration details to bypass restrictions.
• Do not install an app from a message, QR code or unofficial download page.
• Avoid “guaranteed” systems, fixed matches and paid loss-recovery offers.
• Never share a one-time password or allow remote access to a payment device.

Payments and personal information

Illegal sites may accept cards, bank transfers, e-money or cryptoassets and may use domestic payment intermediaries. A familiar payment method does not make the gambling legal. Changing recipients, transfers to personal accounts and extra fees to release withdrawals are warning signs.

Stop immediately after a suspected scam, contact the bank or payment provider, secure the linked email and phone accounts and preserve the URL, transaction record and communications. Identity documents sent to an offshore site may also create continuing impersonation risk.

Tax on lawful public-racing returns

The National Tax Agency says returns from public competitions can require an income-tax filing and are generally treated as temporary income, subject to the facts and applicable calculation rules. Records of winning returns and the stake for the winning ticket are important; losing-ticket treatment is limited under the standard calculation. Use the current NTA worksheet or qualified advice.

Gambling-harm support

No public wager guarantees profit. Decide loss, spend and time limits in advance, and do not borrow or chase losses. Warning signs include hiding play, missing payments and being unable to stop. Japan’s addiction-support network lists regional consultation services and medical institutions; early contact can protect finances and relationships.

This guide reflects National Police Agency, government-public-information and NTA sources reviewed in September 2026. Laws and official sales channels can change, so verify current government guidance.