Sports

Trade: Gunma Crane Thunders vs. Sendai 89ers

100% YES 0% NO

Opened 25 April 2026 · Settles 9 May 2026

Resolution criteria on PolyGram: In the upcoming Japan B League game, scheduled for May 2 at 2:05AM ET: If the Gunma Crane Thunders win, the market will resolve to "Gunma Crane Thunders". If the Sendai 89ers win, the market will resolve to "Sendai 89ers". If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. The result will be determined based on the final score including any overtime periods.

PolyGram is an on-chain prediction market where you trade YES or NO outcome shares with real USDC on Polygon. For this market, buy YES if you believe the event will happen, or NO if you think it won't. Your maximum loss is your stake — winning shares pay $1.00 each at resolution. Unlike sportsbooks, there is no house edge: prices are set by supply and demand from other traders and reflect the crowd's real-time probability.

Liquidity: —
Total Volume: $6K
24h Volume: —
Open Interest: $3K

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Market outcomes

Gunma Crane Thunders vs. Sendai 89ers

100% YES

0% NO

Market context

The Japan B League will host a matchup between Gunma Crane Thunders and Sendai 89ers on 2 May at 2:05AM ET. The current order book on Polymarket reflects a 100% implied probability for the Gunma Crane Thunders, indicating that traders are pricing this as a near-certain outcome. This extreme probability typically emerges when one team holds a substantial competitive advantage or when market depth is thin relative to the event's significance.

Gunma Crane Thunders have established themselves as a stronger franchise within the B League's competitive structure, whilst Sendai 89ers have faced inconsistency in recent seasons. Historical matchups between these sides, combined with current season standings and roster strength, provide the foundation for how traders are calibrating this probability. When B League games show such skewed pricing, it often reflects genuine performance differentials rather than speculative positioning, though the 100% reading suggests minimal liquidity or extreme confidence in the outcome.

Traders should monitor team injury reports and roster availability in the days preceding the fixture, as B League squads occasionally experience late-team changes that can shift competitive balance. Confirmation of the scheduled start time remains important given the early morning ET window, which could affect game logistics. The settlement window extends to 9 May, providing a buffer for any postponement scenarios. Any announcement regarding player availability or venue changes would be the primary catalyst to watch, though such information typically emerges closer to match day through official B League channels.

Wikipedia Context

Gunma Crane Thunders
The Gunma Crane Thunders are a professional basketball team that compete in the first division of the Japanese B.League. They are based in Ōta, Gunma. It is said that the shape of Gunma Prefecture resembles the shape of a dancing crane. The team's name is a combination of the crane and thunder, which evokes images of "energy" and "speed".
Gunma-chan
Gunma-chan is the fictional yuru-chara mascot of Gunma Prefecture. There are two official versions of the character.
Gun Machine
Gun Machine is a hardboiled detective thriller novel written by English author Warren Ellis. The novel, Ellis' second, was released on 1 January 2013 through Mulholland Books, and reached The New York Times Best Seller list. It follows Detective John Tallow as he becomes involved in a mystery surrounding several unsolved homicides. Ellis intended the book to
Bren light machine gun
The Bren gun (Brno-Enfield) was a series of light machine guns (LMG) made by the United Kingdom in the 1930s and used in various roles until 1992. While best known for its role as the British and British Empire forces' primary infantry LMG in World War II, it was also used in the Korean War and saw service throughout the latter half of the 20th century, incl

Resolution source

This market settles from the official outcome published at https://www.bleague.jp/en/. A proposer submits the final result to the UMA optimistic oracle on Polygon; the two-hour dispute window closes and payouts clear in USDC.

How to trade this market step by step

The mechanics for trading "Gunma Crane Thunders vs. Sendai 89ers" are the same as any other PolyGram sporting event contract. Each YES share resolves to $1 if the event happens, or $0 if it doesn't. The current price between 0¢ and 100¢ is the market's probability estimate, set live by the order book.

Sign in on polygram.ink with your email — no full KYC under $1,500 lifetime trading volume.
Deposit USDC on Polygon (lowest fees, ~$0.01 per transaction) or Ethereum. Funds credit after 12 confirmations.
Pick a side. Buy YES if you believe the event will happen; buy NO if you think it won't. The current YES price reflects the market's collective probability.
Size your position. If you stake 100 USDC at 100% YES, you'll receive shares that pay $100 if YES resolves true — a 0% gross return. If NO resolves, your shares are worth $0.
Set risk controls (optional). Stop-loss, take-profit, and limit-order types all supported. Use the trade ticket's slippage box to cap your maximum entry price.
Wait for resolution. When the event resolves on-chain via the UMA optimistic oracle, the winning side settles to 100¢ automatically and USDC hits your balance within seconds. Withdrawable to any wallet you control.

How active is this market?

$6K in lifetime turnover and $0 of resting liquidity puts this market in the below the median by volume for sports contracts on PolyGram. Order-book depth is thin — large orders may need to be split across the book or executed as limit orders.

The market has been open for under a month — fresh enough that information asymmetry remains a real factor.

Higher-volume markets tend to have tighter spreads and faster price discovery — meaning the displayed YES/NO percentages are more likely to reflect the true crowd-implied probability rather than a single trader's directional view.

Key terms

YES / NO share: A binary outcome token that pays $1.00 if the underlying claim resolves true (YES) or false (NO), and $0 otherwise. The market price between 0¢ and 100¢ is the implied probability.
CLOB: Central limit order book. The matching engine that pairs YES buyers with NO buyers (effectively the same trade). Polymarket's CLOB on Polygon executes trades on-chain via the conditional-tokens framework.
Liquidity: USDC capital sitting in resting limit orders inside the order book. Deeper liquidity means smaller slippage on large trades and a tighter bid-ask spread.
UMA optimistic oracle: The on-chain dispute system that settles each Polymarket market. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution.
Slippage: The difference between the displayed mid-price and your fill price. Affects market orders most; limit orders avoid slippage but may take time to fill.
Conditional token: ERC-1155 outcome share issued by Gnosis Conditional Tokens on Polygon. The token type that resolves to $1.00 or $0.00 at settlement.

See the full prediction-market glossary →

Frequently asked questions

What is the current probability for "Gunma Crane Thunders vs. Sendai 89ers"?

As of today, traders on Polymarket price this outcome at 100%. The number updates continuously as the order book clears. PolyGram mirrors the same live odds with locale-aware formatting and USDC settlement.

How does this market resolve?

Resolution is sourced from https://www.bleague.jp/en/. Settlement is executed by the UMA optimistic oracle on Polygon, with a 2-hour dispute window before payouts clear.

When does this market close?

This prediction market is scheduled to close on 9 May 2026. After the resolving event occurs, settlement typically clears within 24 hours once the UMA optimistic oracle confirms the outcome. All payouts are in USDC on the Polygon network.

How can I trade on "Gunma Crane Thunders vs. Sendai 89ers"?

To trade on this prediction market, create a free PolyGram account at polygram.ink, deposit USDC via Polygon, and place a YES or NO order on the outcome you believe in. You can learn more on our how-it-works page. Your maximum loss is limited to your stake — there is no leverage or margin.

What happens when the market resolves?

When the outcome is determined, winning YES shares pay out $1.00 each in USDC, while losing shares pay $0. Settlement is handled by the UMA optimistic oracle on Polygon — a proposer submits the result, a two-hour dispute window opens, and if uncontested, payouts are distributed automatically. You can withdraw your winnings to any Polygon wallet.

Risk and regulatory note

Prediction-market positions can lose 100% of staked capital. Outcomes are uncertain by definition — historical accuracy of crowd-implied probabilities is high in aggregate but not for any single market. PolyGram does not provide investment advice. Trade only with capital you can afford to lose.

Regulatory status varies by jurisdiction. Germany, the United States, and most EU countries treat Polymarket-style event contracts under one of three frameworks: financial derivative, gambling product, or unregulated novel asset. Consult local counsel before trading.

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