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Japan isn’t opening its doors to Polymarket or Kalshi anytime soon. Strict gambling laws keep both platforms locked out — but a seven-month-old startup called Miraima just hit a million monthly users by doing things the Japanese way.
The trick is points. Not cash. Miraima lets users predict outcomes in sports, stocks, and politics, but nobody wagers actual money. You bet points. You win points. Then you redeem those points through gift cards and loyalty programs — PayPay, Rakuten, that kind of thing. The cash never changes hands directly on the platform itself, which is basically the whole legal argument.
It’s the pachinko model, digitized.
How the Pachinko Loophole Works
Pachinko has operated in Japan for decades under a similar structure. Players win physical tokens inside the parlor, then exchange those tokens for cash through a separate, technically unrelated entity nearby. The fiction is legally durable — or it has been so far. Miraima lifted that structure and moved it online, letting users engage with event-based trading through a points economy that mirrors the interfaces of global platforms like Polymarket, without the direct cash-wagering that would trigger gambling law.
Miraima calls itself Japan’s first prediction market focused on point-based activity. The platform shows event probabilities and trending topics. It looks and feels like Polymarket. But legally, it’s something else — at least for now.
Legal experts say the distinction between point-wagering and cash-wagering is currently defensible. Key word: currently. Japan’s regulatory environment isn’t static, and there’s real money being put into tightening it. The Casino Management Commission got a budget boost in 2026, and digital monitoring capabilities are expanding. Nobody’s saying the loophole closes tomorrow, but the people watching this space closely aren’t exactly relaxed about it either.
Polymarket’s 2030 Target and the MGM Osaka Connection
Polymarket isn’t waiting around passively. The company wants regulatory approval in Japan by 2030 and has appointed Mike Eidlin to lead its Japanese push. That 2030 target isn’t random — it lines up with the expected opening of MGM Osaka, Japan’s first integrated casino resort. The thinking seems to be that if Japan is building a full casino, the regulatory framework around gambling and gaming will probably shift enough to make room for legitimate prediction market operators.
Maybe. It’s not guaranteed. Japan’s path to integrated resorts has been slow and heavily contested, and prediction markets are a different regulatory animal than slot machines and baccarat tables. But the timing is deliberate, and Eidlin’s appointment shows Polymarket is treating Japan as a serious medium-term market rather than a long shot.
Kalshi faces similar restrictions and continues operating in other markets, including India, while the Japan question stays open.
What Miraima’s Growth Actually Means
A million monthly users in seven months is fast. That’s not a niche experiment — that’s product-market fit. And it says something about demand in Japan for event-based trading that the current legal environment can’t fully satisfy through traditional channels.
Japan has a deep cultural affinity for gaming, point collection, and loyalty programs. PayPay and Rakuten aren’t obscure redemption partners — they’re embedded in daily consumer life for tens of millions of people. Miraima plugged prediction markets into infrastructure that Japanese users already trust and use constantly. That’s a smart distribution play, not just a legal workaround.
But the model’s long-term durability is genuinely unclear. Point-based platforms exist in a gray area, and gray areas have a way of getting defined — usually by regulators who didn’t write the original rules with this use case in mind. The increased budget for the Casino Management Commission and the expansion of digital monitoring mean the government has more tools to scrutinize these platforms than it did even a year ago.
Legal experts maintain the current framework holds. And for now, Miraima keeps growing. The platform’s rapid rise probably makes it harder to shut down quietly — a million users creates political and economic weight that a startup with ten thousand users doesn’t have. That’s not legal protection, but it’s something.
International platforms are watching closely. If Japan’s regulatory environment softens ahead of the MGM Osaka opening, there’s a real market to enter. If it tightens instead — if the Casino Management Commission decides point-based prediction platforms are gambling in substance regardless of structure — then even Miraima’s model faces pressure.
Polymarket has Mike Eidlin in place and a 2030 timeline on the calendar. Miraima has a million users and a seven-month head start on everyone else.
Frequently Asked Questions
How does Miraima avoid Japan’s gambling laws?
Miraima uses a point-based system where users wager and win points rather than cash, then redeem those points through gift cards and loyalty programs like PayPay and Rakuten — a structure similar to the pachinko industry’s legal model.
When does Polymarket plan to enter Japan?
Polymarket is targeting regulatory approval by 2030, a timeline that aligns with the expected opening of MGM Osaka, Japan’s first integrated casino resort. The company has appointed Mike Eidlin to oversee its Japanese operations.
