
Illegal online gambling in Japan has grown into a massive underground market. Millions of residents now place bets quietly from their phones at home. According to the National Police Agency, 3.4 million Japanese residents have used offshore gambling sites, and almost 2 million are regular players. Annual spending has soared to JPY1.2 trillion, revealing a hidden industry expanding faster than expected. In response, the Japanese government has launched a nationwide strategy to curb illegal iGaming.
Rising Risks for Young Gamblers
Experts warn that online gambling is highly accessible for minors. The combination of speed, privacy, and constant availability makes it easy for children to develop risky gambling habits without adults noticing. Professor Toshiaki Tsuneoka of Showa Medical University emphasized that smartphones make gambling almost effortless, raising concerns about early addiction. Currently, around 5% of offshore gamblers are aged 10 to 19, highlighting a growing youth protection issue.
Japan Introduces Tougher Penalties and Awareness Campaigns
Japan’s new plan makes it clear that gambling on offshore sites is illegal, even if the operator is licensed abroad. Penalties include fines of up to JPY500,000 and prison sentences of up to three years for repeat offenders. Beyond enforcement, the strategy emphasizes public education, awareness campaigns, and stronger support systems for families affected by gambling harm.
Legal Casino Expansion Creates a Contradiction
While cracking down on illegal gambling, Japan is also expanding its legal gaming sector. The MGM Osaka Integrated Resort, scheduled to open in 2030, will feature 2,000 gaming machines, 200 table games, and thousands of electronic games. The resort expects 20 million visitors per year and revenue of JPY520 billion. Local residents will pay an entry fee, with Osaka locals paying double due to municipal levies. Alongside pachinko, lotteries, and licensed sports betting, this new IR will further reshape Japan’s gambling landscape.
Government Funding for Gambling Harm Remains Low
Despite high revenue from legal gambling, Japan allocates only JPY840 million to prevention programs. Advocates argue this is far from enough. Noriko Tanaka of the Society Concerned About Gambling Addiction cited 398 gambling-linked suicides in 2024, warning the true number may be higher. She stressed that progress on addiction countermeasures has been minimal.
Illegal Gambling Can Lead to Crime
Recent cases illustrate the risks. One boy, who started gambling in sixth grade, reportedly ran romance scams to repay gambling debts. He impersonated a college student and defrauded dozens of men. Experts say this reflects a broader trend: illegal online gambling often drives young users to commit other crimes.
Balancing Legal and Illegal Gaming
Japan faces a complex challenge. As legal gaming expands and illegal offshore gambling grows, the government must protect citizens without pushing them further underground. The new strategy is a step forward, but its success depends on strict enforcement, public awareness, and support for those struggling with gambling addiction.



