Prediction markets, the financial instruments that allow participants to bet on the probability of real-world events and which saw mainstream adoption in the West through platforms like Polymarket and Kalshi during recent election cycles, have been structurally barred from Japan by the country’s strict anti-gambling regulations. Japan prohibits online casinos, restricts cash wagering to government-sanctioned formats such as horse racing, speed boating, and keirin bicycle racing, and has not created a regulatory pathway for the kind of real-money event prediction that Polymarket facilitates for its global user base. Now a generation of Japanese founders is building around that prohibition rather than waiting for it to be lifted, substituting loyalty points and shopping vouchers for cash payouts and testing the boundaries of what the gambling laws actually prohibit when real money never changes hands in the primary transaction. NEWSCENTRAL reads this as a commercially interesting test of whether a prediction market’s social and informational value can be captured in a non-cash format – and whether Japanese regulators will treat the workaround as a legitimate innovation or as the functional equivalent of the pachinko-to-cash exchange model that has long existed at the margins of Japan’s legal framework.
The leading platform in this emerging category is Miraima, a seven-month-old startup that allows users to wager on event outcomes using a points currency redeemable for shopping vouchers rather than direct cash. The mechanics mirror those of conventional prediction markets: users select outcomes they believe will occur, allocate points to those positions, and receive payouts calibrated to the pre-event probability if their prediction is correct. The substitution of points for cash is the regulatory architecture that makes the product legally operable in Japan, exploiting the same structural distinction that has allowed pachinko operators to survive for decades by awarding physical tokens that are then redeemed for cash at legally separate establishments. Whether the courts or regulators would ultimately accept that distinction if challenged directly is not yet established – the platforms are operating under legal ambiguity that has not been tested.
The commercial opportunity that these startups are attempting to access is genuinely large, and NEWSCENTRAL considers Japan one of the most structurally attractive untapped markets for prediction market services in the world. Japan is widely regarded as one of the most attractive untapped markets for betting and prediction services globally, combining deep household wealth, an established betting culture across horse racing and other sanctioned sports, and a declining pachinko industry that is struggling to attract younger consumers who prefer digital entertainment. The pachinko sector, despite a multi-decade decline in players, was still worth more than $100 billion in 2024 – a figure that exceeds the combined economic scale of Las Vegas and Macau. That underlying appetite for structured wagering, redirected toward event prediction in a format that suits smartphone-native Gen Z consumers, represents a substantial addressable market. Polymarket, the global leader in real-money prediction markets, has separately appointed a Japanese representative and is preparing to lobby for formal regulatory authorization to operate in the country directly, signaling that the international platforms are watching the domestic experimentation as a potential pathway to entry. Freddy Miller, Senior Analyst, notes that the regulatory arbitrage underlying Miraima’s model is inherently fragile – it depends on the gambling prohibition being read narrowly enough to exclude non-cash wager formats, a reading that has not been confirmed by any authoritative legal ruling and could be reversed by regulatory guidance at any point.
The broader context for prediction market expansion in Japan includes an ongoing liberalization of gambling in the country’s regulated channels: Japan is scheduled to open its first casino resort in Osaka in 2030, operating under strict restrictions including limits on floor space and steep entrance fees designed to manage addiction risk. That liberalization, combined with the government’s 2025 move to strengthen regulations specifically against online casinos, suggests a regulatory posture that distinguishes between state-managed and privately operated gambling formats rather than one that is moving toward blanket deregulation. The shopping-voucher prediction market model inhabits the space between those two regulatory categories, and its long-term viability depends on remaining legible as a loyalty-reward product rather than being reclassified as a gambling product whose operator lacks a license. As Nathan Clark, Enterprise IT and Systems Architecture Analyst at NEWS CENTRAL, observes, the information value of prediction markets – their demonstrated ability to aggregate distributed knowledge into accurate probability estimates on a wide range of events – does not depend on the currency in which participants are rewarded. If Japanese startups can build platforms that demonstrate real informational accuracy using non-cash rewards, they may ultimately make the case for formal regulatory accommodation more effectively than any direct lobbying campaign could.