Dinopolis

What is Dinopolis?

At the same time, prediction market operators are facing regulatory tussles in the US. State regulators are moving to shut down the firms under gambling laws. The companies say their contracts should be regulated at the federal level as derivatives. 

However, the sector has grown substantially despite such disputes. Bernstein predicted in April that annual prediction market volume could reach $1 trillion by 2030. The research estimated volume was around $51 billion in 2025 and could grow to around $240 billion in 2026. 

The partnership with Yahoo Finance wraps up as prediction markets push for broader distribution across financial media, sports, and entertainment platforms. For Polymarket, the loss of the Yahoo Finance hub is one distribution channel, but other partnerships remain intact.

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Ultimately Leckert remains positive on Japan’s IR opportunity. “Stringent regulation really supports a strong industry,” she says. “I don’t see those being at odds with one another, because it’s been done very successfully elsewhere.”

Japan’s ability to lure back the world’s biggest casino developers will hinge on the regulatory framework the government unveils later this year, says Klebanow.

If it strikes a more reasonable balance that encourages economic development, “you will see the world’s best casino operators submit proposals”, he says. The government, he adds, must show it is prepared to give developers enough room to manage the risks of committing billions of dollars in capital.

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“They lose quicker, dry up quicker, recruitment or re-recruitment,” he says. “If the recruitment of players dries up, then what are you going to do? Definitely there can be components like that.”

For now, the growth provides room for multiple market makers. Marantelli expects margins to “stay good during the growth period” before contracting as competition intensifies. The more complex RFQ and parlay markets may offer the best protection against that compression.

The result is an emerging ecosystem that looks less like millions of customers casually trading predictions with one another and more like an outsourced sportsbook trading room. Exchanges own the platform and recruit the customers; specialist firms price the risk and provide the money needed to make those markets function.