Japan Eyes Prediction Market Rules for Kalshi, Polymarket

A parliamentary group within the LDP, the Digital Advanced Finance Parliamentary League, will add prediction markets to its discussion agenda. The group aims to clarify the legal status of platforms that let users trade on real-world event outcomes, a category regulators worldwide are still figuring out how to classify.

Executives Plan a Visit

Executives from U.S. platforms Kalshi and Polymarket are reportedly planning a trip to Japan, feeding directly into the lawmakers’ information gathering process.

Polymarket already maintains a Japanese language site, but actual trading on the platform remains restricted for users in Japan. That gap between having a local presence and having legal access is exactly what this parliamentary discussion is meant to address.

The Gambling Question

Japan’s Financial Services Agency (FSA) currently has no specific law governing prediction markets. Toshiyuki Inoue, Director General of the FSA’s Planning and Markets Bureau, made that clear earlier this year, warning that such transactions could be interpreted as gambling and calling for extremely cautious handling.

The legal risk is spelled out under Article 185 of Japan’s Penal Code, which treats staking money on an outcome for personal gain as potential illegal gambling. Any prediction market business needs clear legal status before it can operate in Japan, and right now that status doesn’t exist.

Not a Japan Only Problem

Prediction markets let participants bet on future events, from elections to economic data to crypto prices, and platforms like Kalshi and Polymarket have grown quickly in the U.S. That growth has invited regulatory scrutiny well beyond Japan.

• New York’s Attorney General sued Coinbase and Gemini in April
• The lawsuit alleged their prediction market offerings were illegal gambling under state law
• Japan’s FSA has flagged similar overlap with its own gambling statutes

Where Things Stand

The LDP group is currently in a pre-legislative stage, planning to gather input from both Japanese and U.S. firms. The immediate goal is mapping out the issues, not drafting specific rules. Party sources confirmed this isn’t yet formal institutional design.

The core question remains where prediction markets sit relative to Japan’s existing gambling regulations. Until that’s resolved, market access for these platforms stays exactly where it is now: unresolved.

Hashlytics Take

Worth being clear about what actually happened here. A parliamentary group agreed to talk about talking about rules. Kalshi and Polymarket flying executives to Japan is a genuine signal of intent on their side, but it doesn’t move the legal needle at all. The real story is that Japan’s FSA has already told everyone where the risk sits, gambling law, and until the LDP produces something resembling a bill, every headline about this remains a pre-legislative gesture, not a regulatory shift.