gumi Shuts "Yosoku Hiroba" Five Months After Launch: Why a Free, Points-Based Prediction Market Built to Avoid Gambling Law Could Not Survive in Japan

What happened: new questions halted on the day of the announcement

The operator announced on its official X account on November 2 that all services would end at 12:00 on December 18. Earning of "Yosopo," the points used to enter predictions, and the posting of new questions ended the same day; existing questions remain open until their individual deadlines. Earning of the reward points "Gold" ends at noon on November 30, and conversion of Gold to e-money and other rewards closes at noon on December 18. Conversion requires at least 5,500 Gold (worth JPY 500, about USD 3), and unconverted Gold expires regardless of its stated validity period, with no refund or compensation. Inquiries close on December 25, after which registered users' personal data will be deleted except where retention is legally required. No reason was given.

What the service was: a prediction market where no one pays

Launched on June 9, 2026, Yosoku Hiroba was a "completely free prediction entertainment service" in which users predicted outcomes in politics, economics, sports and entertainment and competed on accuracy. Users entered predictions with free Yosopo and could convert Gold earned from correct calls and rankings into e-money through services such as Erabable Pay. gumi had announced on March 3 that it would develop a prediction data service with Gunosy as initial partner, and on August 20 added a "Yosoku" tab inside the Gunosy iOS app that let readers participate without registering. According to NADA NEWS, gumi explained that taking money from users to bet on outcomes could constitute gambling under Japanese law, so it built a system in which users pay nothing, after consultation with a law firm. gumi runs blockchain businesses alongside mobile games, and the service was reported as an attempt to popularize a Japanese prediction market without crypto assets or wallets in its initial phase.

The contrast abroad: a USD 40 billion valuation the same week

In the week of the shutdown announcement, US prediction markets kept expanding. According to New Economy's November 2 roundup, Kalshi raised USD 1 billion in a Series G at a USD 40 billion valuation. On October 30 Coinbase disclosed that its prediction market revenue had exceeded USD 200 million on an annualized basis, and ICE, parent of the NYSE, announced plans to build a US perpetual futures market with Trade[XYZ]. Friction with regulators is rising too: Utah criminally charged Kalshi and two co-founders, and European securities regulators noted that major platforms lack EU authorization. In Japan, a prediction market that stakes money is hard to reconcile with gambling law, and Yosoku Hiroba was a points-based experiment designed within that constraint.

Reading the structure: what the free design gave up

By avoiding legal risk, the design surrendered two functions that prediction markets exist to provide. First, price as an aggregator of information. Predictions made with free points carry no loss, weakening the incentive to bring real information, so results drift toward an opinion poll. Second, a revenue source. With no fees or margin from users, rewards had to be funded from advertising or data sales, which evidently did not reach scale within six months. gumi has not stated its reasons, but the JPY 500 minimum conversion threshold and the fact that even a Gunosy distribution channel did not prevent closure point to the difficulty of a "free acquisition, indirect monetization" model. Commercializing prediction markets in Japan would require either treating them as derivatives under the Financial Instruments and Exchange Act or awaiting legislative change; at present neither the points model nor a financial-product model has reconciled economics with law.

[Business Development Insights]

1. A design that removes a function to avoid regulation fails when that function is the core of the value. A prediction market's value lies in participants who bear loss embedding information in prices; making it free removes that core. When routing around a legal constraint, first determine whether what is lost is the heart of the business.
2. The "acquire for free, monetize through ads and data" model did not close within six months even with a news-app partner. That closure followed despite the Gunosy channel suggests either low retention for prediction content or an immature market for the resulting data. Companies considering similar models should assume a monetization horizon beyond one year and verify they can fund rewards for that period.
3. The viable path into prediction markets in Japan runs through finance, not entertainment. Overseas, financial infrastructure such as ICE and Coinbase is plugging into prediction markets; in Japan a design that fits derivatives regulation under the FIEA is more likely to endure than one built to sidestep gambling law. Financial institutions and exchanges can treat the area as an extension of their own derivatives product design rather than as a game company's experiment.

[Sources]

gumi Inc., "Completely free prediction entertainment service Yosoku Hiroba released today" (June 9, 2026) https://gu3.co.jp/news/archives/9211/ gumi Inc., "gumi's Yosoku Hiroba now available in the iOS version of the Gunosy news app" (August 20, 2026) https://gu3.co.jp/news/archives/9234/ New Economy, "gumi to end prediction service Yosoku Hiroba about six months after launch" (November 2, 2026) https://www.neweconomy.jp/posts/623285 gamebiz, "gumi to terminate Yosoku Hiroba on December 18, 2026" (November 2, 2026) https://gamebiz.jp/news/434964 NADA NEWS, "gumi announces end of Yosoku Hiroba five months after launch" (November 2, 2026) https://www.nadanews.com/389271/ NADA NEWS, "Will a Japanese prediction market grow from points programs? gumi launches free prediction service" (June 9, 2026) https://www.nadanews.com/354817/ New Economy, "[Nov 2 topics] ... Kalshi raises USD 1 billion in Series G at USD 40 billion valuation" (November 2, 2026) https://www.neweconomy.jp/posts/623203 New Economy, "[Oct 30 topics] ... Coinbase prediction market revenue tops USD 200 million annualized / Utah charges Kalshi and co-founders" (October 30, 2026) https://www.neweconomy.jp/posts/622590