Sanfrecce Hiroshima vs. Nagoya Grampus

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Active sub-markets

Market context

Sanfrecce Hiroshima will host Nagoya Grampus on 23 May 2026 in a J1 League fixture. The 100% implied probability reflects near-certainty that this match will occur as scheduled, a baseline expectation for any fixture in Japan's top division absent extraordinary circumstances. The settlement window closes just hours after kick-off, meaning the market is pricing in fixture completion rather than outcome.

The J1 League has maintained consistent scheduling through its modern era, with postponements or cancellations rare outside natural disasters or severe weather events. Comparable domestic league matches in Japan typically settle at 95–99% probability when within two weeks of play, accounting for residual weather risk and injury-related squad concerns. The 100% reading here suggests traders view mid-May conditions and both clubs' operational status as presenting negligible disruption risk.

Traders should monitor weather forecasts for the Hiroshima region in the final week before 23 May, as spring storms occasionally force fixture rescheduling in Japan. Team news from both clubs—particularly injury announcements affecting squad availability—rarely triggers cancellation but could theoretically prompt late administrative changes. The J1 League's fixture calendar for 2026 remains subject to confirmation; any unexpected league restructuring or scheduling conflicts would surface through official J-League announcements, though such revisions typically occur months in advance rather than weeks before match day.

Methodology

We track Sanfrecce Hiroshima vs. Nagoya Grampus on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

On PolyGram, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

PolyGram is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

What does it cost to trade on PolyGram?

Zero. PolyGram routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram triggers a quick verification flow that finishes in minutes.