Japan

Japan operates a restrictive "public-sports-only" gambling model: the Penal Code broadly criminalizes betting, with narrow statutory exceptions for four government-run "kōei kyōgi" sports (horse racing, keirin cycling, motorboat racing, auto racing), the public lottery, and the toto sports lottery. Horse racing is the flagship legal vertical, governed by the Horse Racing Act (1948) and operated by the JRA under MAFF, with pari-mutuel betting available in person or online.

General/private fixed-odds sports betting is prohibited, there are no domestically licensed sportsbooks, and offshore betting is treated as criminal regardless of operator location. In 2025 Japan amended the Basic Act on Countermeasures Against Gambling Addiction (effective 25 Sep 2025) to ban the launch and advertising of online casinos. Prediction markets sit in a prohibited-leaning grey area with no dedicated framework (Polymarket geo-blocks Japan and is lobbying for approval by ~2030).

The minimum age for public-sports betting, including JRA horse racing, is 20.

The Japanese government regulates all form of gambling inside the country. Most Western-style games were completely outlawed for a long time, but integrated-resort legislation changed that, and Japan's first casino resort is now under construction in Osaka with an opening scheduled for 2030.

Furthermore, gambling laws outlaw most Japanese betting sites. Several of the largest international brands still accept customers from Japan and even accept Japanese yen deposits, but that does not make the betting lawful: online casinos are illegal in the country, and Japan began enforcing a new law on 25 September aimed at curbing gambling addiction.

The following online betting sites accept bettors from Japan and allow accounts denominated in yen. They are licensed in other countries, but an offshore licence does not make the wager lawful for someone placing it from Japan, where online casinos are illegal and a 2025 law bans their launch and their advertising.

Japan Betting Sites

These sites are not legal in Japan, though each holds a license in a jurisdiction that regulates internet gaming. Japan cannot enforce its laws against an operator abroad, but the bet itself is placed in Japan, where the Penal Code reaches the bettor and a 2025 law prohibits the launch of online casinos and bans gambling advertising.

Japanese officials have recently shown much more interest in actively prohibiting online gambling. A 2025 amendment to the gambling-addiction law now bans online casino services and gambling advertising outright. Offshore gambling sites remain reachable for now, but they operate under mounting official pressure.

Is It Legal to Bet Online in Japan?

The act of placing an online bet in Japan is illegal. The laws on the books state that it is illegal for individuals to place bets in any format other than those that are explicitly ruled legal by the government. If it isn’t horse betting, bicycle racing, motorboats, motorcycle racing or sports-lottery (“toto”/WINNER) betting on soccer and basketball, it is illegal.

The laws on the books make it possible to be fined up to ¥500,000 if you’re caught participating in unlawful gambling. However, these laws were long only loosely enforced against individual bettors, though authorities have been cracking down on online gambling in recent years. Millions of Japanese customers have played at unlicensed offshore websites, but the government is now actively trying to stamp this out. Many international betting sites still accept customers from Japan, but the legal environment has tightened considerably.

If that doesn’t make you feel any better about gambling online, consider the game of pachinko. There are at least 13,000 pachinko parlors located across Japan and none of these are technically allowed to be operated as gambling operations. Nevertheless, pachinko is a huge gambling game.

The owners of pachinko parlors encourage gambling by setting up unlicensed kiosks where the winners of pachinko games can redeem their pachinko balls for valuable prizes and cash. This violates the law but officials turn a blind eye to it. Gambling is engrained in Japanese culture.

Japan Betting and Gambling Laws

Only specific forms of wagering are expressly legal in Japan. Legal gambling options include the nation’s lottery and parimutuel wagering on horse races, motorcycle races, bicycle races (keirin) and powerboat races. A limited form of sports betting is allowed in conjunction with the nation’s J-League soccer and, since September 2022, B.League basketball via the WINNER lottery.

All other forms of gambling are illegal in Japan. Casino games, slot machines, poker and sports betting are all illegal. Citizens may neither host these games nor participate.

Considering this longstanding prohibition, you may be surprised to learn that Japan is home to a multi-billion dollar a year gambling industry. Pachinko alone is estimated to be a $230+ billion industry. To put that in perspective, that’s more than the Japanese auto industry. And that’s just one form of questionably-legal gambling.

Legal online betting in Japan consists of parimutuel slips, lottery tickets and toto/WINNER sports-lottery slips over the internet. That’s the extent of legal online gambling in Japan.

Casino Gambling in Japan

Gambling legislation enacted in December of 2016 changed Japan’s approach to gambling in a profound way. Until the integrated-resort legislation of the mid-2010s, a longstanding prohibition prevented the construction of casinos anywhere in Japan. All gambling games such as blackjack, slot machines and so on was considered illegal across the country.

In the latter part of 2016, lawmakers decided to reverse the prohibition and lay the groundwork for a legal permitting large resort/casinos. That piece of legislation is now in place, and after years of further rule-making Japan's first casino resort broke ground in April 2025: MGM Osaka is scheduled to open in the autumn of 2030.

Japan presents a golden opportunity for international casino operators keen on expanding into new markets. In addition to being a popular tourist destination, Japan ranks as one of the biggest countries in the world by GDP, has a modern infrastructure and is home to a domestic population of voracious gamblers.

According to one estimate, just three large resort-casinos would be capable of generating nearly $10 billion per year in net revenue. If that estimate holds true, the gambling industry would account for roughly 0.2% of Japan’s already-significant GDP.

Horse Racing Betting in Japan

Betting on racing events in Japan is similar to betting on horse racing anywhere else. You can make win/place/show wagers and a variety of exotics on the outcomes of these races. Horse racing betting is big business in Japan with more than 21,000 races held every year in the country.

Keirin cycling offers a similar format for wagering. In Japan, races consist of nine cyclers who jockey for position moving at speeds of up to 70 km/h to finish first in a 2,000 meter race. It’s possible to purchase betting tickets online, but most keirin betting is done in-person at one of the nation’s 45 velodromes.

Soccer Betting in Japan

Betting on soccer is limited to the pool-style sports lottery products (toto, BIG and WINNER) covering J.League matches. You can legally bet on multiple games via parlay-style wagers in which you choose the winner of multiple games. The house takes quite a bit off the top, but you can still earn significant payouts if you win a particularly tough accumulator.

Fixed odds betting like you see at traditional betting sites isn’t allowed within Japan. The big international bookmakers cover J-League soccer extensively.

Japanese Lotto

Local governments also run lotteries (takarakuji) and a soccer-based lottery run by “Big”. The soccer formats administered by Big resemble lotteries more than actual sports betting while Toto allows for accumulator (parlay) style wagers on multiple soccer matchups.

Online betting isn’t even offered in Japan outside of these specifically mentioned forms of gambling, and then only at certain designated sites. There’s a serious lack of options and that’s why so many Japanese citizens end up trying their luck at offshore betting sites.

Brick and mortar gambling is also mostly outlawed. You won’t find any Western-style resort casinos in Japan like you would elsewhere. However, that is now changing: construction of the country's first casino resort began in Osaka in 2025. The Liberal Democratic Party of Japan submitted a bill in June of 2014 to legalize and promote resort casinos.

Japanese gamblers have long been willing to fly to Macau to play traditional casino games, and the Japanese market is well past considering brick-and-mortar gambling: MGM Osaka held its groundbreaking ceremony in April 2025 and is scheduled to open in the autumn of 2030. According to the Wall Street Journal, Brokerage CLSA estimated Japan would be capable of producing gambling revenue in excess of $40 billion per year.

Licensed Japanese betting sites remain some way off. The most recent legislative move went the other way: a 2025 amendment bans online casino sites and their advertising.