Sendai 89ers vs. Koshigaya Alphas

Prediction market · Polymarket

Overview

In the upcoming Japan B League game, scheduled for April 22 at 6:05AM ET: If the Sendai 89ers win, the market will resolve to "Sendai 89ers". If the Koshigaya Alphas win, the market will resolve to "Koshigaya Alphas". 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.

Ticker

bkjpn-sen-kos-2026-04-22

Volume

2.4K

Open interest

1.6K

Liquidity

Start

Apr 18, 2026

End

Apr 29, 2026

Status

Closed

Access

Restricted

Created

Apr 22, 2026

Resolution source

https://www.bleague.jp/en/

Event ID

391384

Slug

bkjpn-sen-kos-2026-04-22

Markets

1

Raw event data
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  "ticker": "bkjpn-sen-kos-2026-04-22",
  "slug": "bkjpn-sen-kos-2026-04-22",
  "title": "Sendai 89ers vs. Koshigaya Alphas",
  "description": "In the upcoming Japan B League game, scheduled for April 22 at 6:05AM ET:\nIf the Sendai 89ers win, the market will resolve to \"Sendai 89ers\".\nIf the Koshigaya Alphas win, the market will resolve to \"Koshigaya Alphas\".\nIf the game is postponed, this market will remain open until the game has been completed.\nIf the game is canceled entirely, with no make-up game, this market will resolve 50-50.\nThe result will be determined based on the final score including any overtime periods.",
  "resolutionSource": "https://www.bleague.jp/en/",
  "startDate": "2026-04-18T07:39:00.86016Z",
  "creationDate": "2026-04-22T10:05:00Z",
  "endDate": "2026-04-29T10:05:00Z",
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  "icon": "https://polymarket-upload.s3.us-east-2.amazonaws.com/super+cool+basketball+in+red+and+blue+wow.png",
  "active": true,
  "closed": true,
  "archived": false,
  "new": false,
  "featured": false,
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  "volume": 2447.4686699999993,
  "openInterest": 1605.15661,
  "createdAt": "2026-04-18T07:31:22.783353Z",
  "updatedAt": "2026-04-24T08:32:20.905108Z",
  "enableOrderBook": true,
  "negRisk": false,
  "commentCount": 0,
  "markets": [
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      "id": "2012456",
      "question": "Sendai 89ers vs. Koshigaya Alphas",
      "conditionId": "0xab90a18cc83691c4fba8c8224750bc1dda85a0e5da83481014e6b66dfc354c97",
      "slug": "bkjpn-sen-kos-2026-04-22",
      "resolutionSource": "https://www.bleague.jp/en/",
      "endDate": "2026-04-29T10:05:00Z",
      "startDate": "2026-04-18T07:34:00.423073Z",
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      "icon": "https://polymarket-upload.s3.us-east-2.amazonaws.com/super+cool+basketball+in+red+and+blue+wow.png",
      "description": "In the upcoming Japan B League game, scheduled for April 22 at 6:05AM ET:\nIf the Sendai 89ers win, the market will resolve to \"Sendai 89ers\".\nIf the Koshigaya Alphas win, the market will resolve to \"Koshigaya Alphas\".\nIf the game is postponed, this market will remain open until the game has been completed.\nIf the game is canceled entirely, with no make-up game, this market will resolve 50-50.\nThe result will be determined based on the final score including any overtime periods.",
      "outcomes": "[\"Sendai 89ers\", \"Koshigaya Alphas\"]",
      "outcomePrices": "[\"1\", \"0\"]",
      "volume": "2447.4686699999993",
      "active": true,
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      "createdAt": "2026-04-18T07:31:22.882069Z",
      "updatedAt": "2026-04-23T15:35:32.008835Z",
      "closedTime": "2026-04-22 16:10:14+00",
      "new": false,
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      "submitted_by": "0x91430CaD2d3975766499717fA0D66A78D814E5c5",
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      "resolvedBy": "0x65070BE91477460D8A7AeEb94ef92fe056C2f2A7",
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      "groupItemThreshold": "0",
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      "endDateIso": "2026-04-29",
      "startDateIso": "2026-04-18",
      "hasReviewedDates": true,
      "gameStartTime": "2026-04-22 10:05:00+00",
      "secondsDelay": 3,
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      "umaBond": "500",
      "umaReward": "2",
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      "takerBaseFee": 1000,
      "customLiveness": 0,
      "acceptingOrders": false,
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      "ready": false,
      "funded": false,
      "acceptingOrdersTimestamp": "2026-04-18T07:32:56Z",
      "cyom": false,
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      "approved": true,
      "rewardsMinSize": 0,
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      "spread": 0.001,
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      "oneDayPriceChange": 0.1545,
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      "sportsMarketType": "moneyline",
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      "deployingTimestamp": "2026-04-18T07:31:25.081089Z",
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      "feeType": "sports_fees_v2",
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  "series": [
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      "ticker": "bkjpn",
      "slug": "bkjpn",
      "title": "Japan B League",
      "seriesType": "single",
      "recurrence": "daily",
      "active": true,
      "closed": false,
      "archived": false,
      "featured": false,
      "restricted": true,
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      "updatedAt": "2026-04-24T08:40:13.917793Z",
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  "tags": [
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      "label": "Sports",
      "slug": "sports",
      "forceShow": false,
      "publishedAt": "2023-10-24 22:37:50.296+00",
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      "createdAt": "2023-10-24T22:37:50.31Z",
      "updatedAt": "2026-04-17T20:47:16.461062Z",
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      "slug": "games",
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      "createdAt": "2024-09-23T22:41:37.670714Z",
      "updatedAt": "2026-03-09T22:28:03.358133Z",
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      "label": "Basketball",
      "slug": "basketball",
      "forceShow": false,
      "publishedAt": "2023-11-02 21:04:25.152+00",
      "createdAt": "2023-11-02T21:04:25.158Z",
      "updatedAt": "2026-04-17T20:16:02.304942Z",
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      "label": "Japan B League",
      "slug": "bkjpn",
      "createdAt": "2026-03-27T00:10:24.836457Z",
      "updatedAt": "2026-04-17T20:32:29.101728Z",
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  "cyom": false,
  "closedTime": "2026-04-22T16:10:14Z",
  "showAllOutcomes": true,
  "showMarketImages": false,
  "automaticallyResolved": true,
  "enableNegRisk": false,
  "automaticallyActive": true,
  "eventDate": "2026-04-22",
  "startTime": "2026-04-22T10:05:00Z",
  "seriesSlug": "bkjpn",
  "period": "NS",
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  "gameId": 4895041,
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  "eventMetadata": {
    "context_description": "Trader consensus pins Sendai 89ers at a near-certain 100% implied probability to defeat Koshigaya Alphas in this B.League Eastern Conference Round 34 matchup, driven primarily by Alphas star center Kai Sotto's one-game suspension and ¥50,000 fine for disciplinary action, stripping their interior presence. Sendai's strong 33-22 record and home-court advantage at Sendai contrast sharply with Koshigaya's dismal 18-37 campaign and poor away form, where they've covered +15.5 point handicaps in recent visits. Sendai rides playoff momentum with contributors like Jarrett Culver thriving, while Alphas grapple with frustrations from recent losses. Barring Sendai injuries, rest for rotation players, or an improbable Alphas shooting surge, the outcome appears locked.",
    "context_requires_regen": true,
    "context_updated_at": "2026-04-22T15:41:54.806Z"
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  "teams": [
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      "name": "Sendai 89ers",
      "league": "bkjpn",
      "record": "0-0",
      "logo": "https://polymarket-upload.s3.us-east-2.amazonaws.com/Sendai 89ers-28361ed47e.png",
      "abbreviation": "sen",
      "createdAt": "2026-04-01T07:31:11.11388Z",
      "updatedAt": "2026-04-09T18:57:58.12494Z",
      "providerId": 796384,
      "color": "#c9aa02"
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    {
      "id": 3270058,
      "name": "Koshigaya Alphas",
      "league": "bkjpn",
      "record": "0-0",
      "logo": "https://polymarket-upload.s3.us-east-2.amazonaws.com/Koshigaya Alphas-5e1ab3fce4.png",
      "abbreviation": "kos",
      "createdAt": "2026-04-01T07:31:11.159307Z",
      "updatedAt": "2026-04-10T09:00:01.5623Z",
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}