Will Super Typhoon Dolphin hit Japan?

Platform comparison

Market context

Polymarket has this contract priced at **100% YES** on USDC-settled conditional tokens on Polygon, so the market is already treating a Japanese landfall by Super Typhoon Dolphin as effectively certain. For a trader, the key distinction is that the contract resolves on the centre of circulation crossing Japanese coastline, using JMA position advisories or credible reporting, not on mere nearby impacts, outer rainbands, or a close pass offshore.

That near-certainty is consistent with the recent track history. Reporting through late July and early August repeatedly showed Dolphin on a west-northwest path towards Japan, with the latest guidance at one stage pointing towards Okinawa and the Ryukyu chain, before later model shifts raised and then narrowed the odds of a more direct Japanese strike[1][2][7][15]. Comparable typhoon markets tend to reprice fastest when the forecast cone shifts, because a landfall call can flip from “possible” to “effectively locked” once the centre has entered the Japanese warning area and the steering pattern is stable. The current 100% print therefore reflects not just intensity, but the market’s view that some part of Japanese territory will be crossed before the settlement cut-off.

The main catalysts now are the JMA advisories, any changes in track from the JTWC, and live reporting on whether the core stays aligned with Okinawa/Ryukyu land or slips just offshore[1][2][10]. The JMA’s position statements matter most for resolution, while international wire-style coverage can act as confirmation if landfall is visually or operationally clear. Traders watching the final stretch should focus on whether Dolphin’s centre remains aimed at Japanese islands rather than turning west into the East China Sea, because that is the difference between a clean “Yes” and an eventual dispute over whether it actually crossed land.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Kalshi UK, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

UK Frequently Asked Questions

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.