The Prediction Markets

Japan NPB Champion

Closes
Dec 15, 2026, in 53 days
Traded
$52K
Venues
Polymarket, Kalshi
Prices updated
just now
Share

What the markets expect

Fukuoka Hawks 69.5%

Next is Fukuoka Hawks at 67%. The venues differ most on Yokohama DeNA BayStars (Polymarket 28%, Kalshi 27%), a 1.0-point gap.

Odds by venue

Consensus blends each venue’s last price, weighted by how much has traded there. Best Yes price is the cheapest ask across venues, and the payout is what a winning $100 stake returns before fees. Open a row for each venue’s contract name, bid and ask, and how closely their rules match.

Prices come from our regular polls of each venue, the oldest 6 min ago. Ages are as of when this page was built.

  • Polymarket
  • Kalshi
Fukuoka Hawks
69.5%
Polymarket 69.5%polled, 6 min agoBest Yes 71¢ on Polymarket, $100 pays $141 (1.41x)
Polymarket
Contract
Fukuoka SoftBank Hawks
Last price
69.5%
As of
Polled 6 min ago
Buy Yes
71¢
Sell Yes
68¢
$100 on Yes pays
$141 (1.41x)
Volume
$10K
Trade this on Polymarket
Fukuoka Hawks
67%
Kalshi 67%polled, 31s agoBest Yes 74¢ on Kalshi, $100 pays $135 (1.35x)
Kalshi
Contract
Fukuoka Hawks
Last price
67%
As of
Polled just now
Buy Yes
74¢
Sell Yes
67¢
$100 on Yes pays
$135 (1.35x)
Volume
$12K
Trade this on Kalshi
Yokohama DeNA BayStars
27.4%
Polymarket 28%polled, 6 min agoKalshi 27%polled, 31s agoBest Yes 27¢ on Kalshi, $100 pays $370 (3.70x)
Polymarket
Contract
Yokohama DeNA BayStars
Last price
28%
As of
Polled 6 min ago
Buy Yes
33.1¢
Sell Yes
22.9¢
$100 on Yes pays
$302 (3.02x)
Volume
$2K
Trade this on Polymarket
Kalshi
Contract
Yokohama DeNA BayStars
Last price
27%
As of
Polled just now
Buy Yes
27¢
Sell Yes
26¢
$100 on Yes pays
$370 (3.70x)
Volume
$4K
Trade this on Kalshi
Same label, rules unverified

Labels suggest the same named outcome; no persisted outcome identity or settlement parity is verified.

Indicative only, prices are 6 min old: No arbitrage: the best bid elsewhere is 22.9¢, at or below the cheapest ask of 27¢.

Hokkaido Nippon-Ham Fighters
20%
Kalshi 20%polled, 31s agoBest Yes 20¢ on Kalshi, $100 pays $500 (5.00x)
Kalshi
Contract
Hokkaido Nippon-Ham Fighters
Last price
20%
As of
Polled just now
Buy Yes
20¢
Sell Yes
—
$100 on Yes pays
$500 (5.00x)
Volume
$631
Trade this on Kalshi
Saitama Seibu Lions
11%
Kalshi 11%polled, 31s agoBest Yes 15¢ on Kalshi, $100 pays $667 (6.67x)
Kalshi
Contract
Saitama Seibu Lions
Last price
11%
As of
Polled just now
Buy Yes
15¢
Sell Yes
—
$100 on Yes pays
$667 (6.67x)
Volume
$606
Trade this on Kalshi
Yomiuri Giants
7%
Kalshi 7%polled, 31s agoBest Yes 28¢ on Kalshi, $100 pays $357 (3.57x)
Kalshi
Contract
Yomiuri Giants
Last price
7%
As of
Polled just now
Buy Yes
28¢
Sell Yes
—
$100 on Yes pays
$357 (3.57x)
Volume
$3K
Trade this on Kalshi
Tokyo Yakult Swallows
3%
Kalshi 3%polled, 31s agoBest Yes 3¢ on Kalshi, $100 pays $3,333 (33.3x)
Kalshi
Contract
Tokyo Yakult Swallows
Last price
3%
As of
Polled just now
Buy Yes
3¢
Sell Yes
—
$100 on Yes pays
$3,333 (33.3x)
Volume
$68
Trade this on Kalshi
Chiba Lotte Marines
2%
Kalshi 2%polled, 31s agoBest Yes 2¢ on Kalshi, $100 pays $5,000 (50.0x)
Kalshi
Contract
Chiba Lotte Marines
Last price
2%
As of
Polled just now
Buy Yes
2¢
Sell Yes
—
$100 on Yes pays
$5,000 (50.0x)
Volume
$708
Trade this on Kalshi
Chunichi Dragons
2%
Kalshi 2%polled, 31s agoBest Yes 2¢ on Kalshi, $100 pays $5,000 (50.0x)
Kalshi
Contract
Chunichi Dragons
Last price
2%
As of
Polled just now
Buy Yes
2¢
Sell Yes
—
$100 on Yes pays
$5,000 (50.0x)
Volume
$3K
Trade this on Kalshi
Hiroshima Toyo Carp
2%
Kalshi 2%polled, 31s agoBest Yes 2¢ on Kalshi, $100 pays $5,000 (50.0x)
Kalshi
Contract
Hiroshima Toyo Carp
Last price
2%
As of
Polled just now
Buy Yes
2¢
Sell Yes
—
$100 on Yes pays
$5,000 (50.0x)
Volume
$1K
Trade this on Kalshi
Show 3 more outcomes
Tohoku Rakuten Golden Eagles
2%
Kalshi 2%polled, 31s agoBest Yes 2¢ on Kalshi, $100 pays $5,000 (50.0x)
Kalshi
Contract
Tohoku Rakuten Golden Eagles
Last price
2%
As of
Polled just now
Buy Yes
2¢
Sell Yes
—
$100 on Yes pays
$5,000 (50.0x)
Volume
$1K
Trade this on Kalshi
Hanshin Tigers
1%
Kalshi 1%polled, 31s agoBest Yes 1¢ on Kalshi, $100 pays $10,000 (100x)
Kalshi
Contract
Hanshin Tigers
Last price
1%
As of
Polled just now
Buy Yes
1¢
Sell Yes
—
$100 on Yes pays
$10,000 (100x)
Volume
$7K
Trade this on Kalshi
Orix Buffaloes
1%
Kalshi 1%polled, 31s agoBest Yes 1¢ on Kalshi, $100 pays $10,000 (100x)
Kalshi
Contract
Orix Buffaloes
Last price
1%
As of
Polled just now
Buy Yes
1¢
Sell Yes
—
$100 on Yes pays
$10,000 (100x)
Volume
$1K
Trade this on Kalshi

No cross-venue arbitrage right now: on every matched outcome, the best bid on one venue is at or below the cheapest ask on the other. Find markets with open spreads

Mostly the same bet: one difference

Where they differ

  • Trading closes at different times: Nov 1, 2026, 11:59 PM UTC on Polymarket and Dec 15, 2026, 3:00 PM UTC on Kalshi.
Polymarket
Polymarket resolves via:
UMA optimistic oracle, source: npb.jp
Kalshi
Kalshi resolves via:
Kalshi (CFTC-regulated exchange), source: Fox Sports, ESPN, Flashscore
Show full rule comparison
  • Trading closes Nov 1, 2026, 11:59 PM UTC on Polymarket and Dec 15, 2026, 3:00 PM UTC on Kalshi.

Summarized from each venue’s published rules; the venue’s own rules page is the final word.

How the odds have moved

The top 3 outcomes on both venues, with the consensus between them. Hover for exact values.

  • Fukuoka Hawks
  • Fukuoka Hawks
  • Yokohama DeNA BayStars

Order books

Each venue’s resting orders for the selected outcome’s Yes contract, side by side. Top of book streams live; depth refreshes every 15 seconds.

Polymarket

Open on Polymarket ↗

Top of book

Connecting
Best bid
—
Spread
—
Best ask
—

Waiting for the first live quote…

Depth · top 8 levels

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Recent trades

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Kalshi

Kalshi doesn’t list Fukuoka Hawks for this event.

What your stake buys

Enter a stake to see where it buys the most after fees, using each venue’s live order book.

$
Buy

Loading both order books…

Buys at the asks resting now (taker orders), cheapest after fees first, from order-book snapshots up to 15 seconds old. Fees: Kalshi 0.07 × price × (1 − price) per share, rounded up to the cent; Polymarket 0.05 × price × (1 − price) per share (sports rate). Fee calculator. Estimates only, not advice.

About this market

Live prediction market odds for "Japan NPB Champion". Fukuoka Hawks leads at 69.5%. Next is Fukuoka Hawks at 67%. $52K has traded across 13 outcomes on Kalshi and Polymarket. The market is expected to resolve by Dec 15, 2026.

Questions

What does the consensus price mean?

It is the price of a Yes contract that pays $1 if the outcome happens. A 14¢ price means traders put the chance near 14%. Where two venues list the same outcome, we blend their last prices, weighting the venue with more trading volume more heavily (neither counts for less than a quarter). When only one outcome can win, each venue’s prices add up to a little over 100% (its margin); the fair chance removes that margin so the outcomes add up to exactly 100%.

How is the payout worked out?

A Yes contract pays $1 if it wins, so at the best ask a $100 stake buys 100 ÷ ask contracts. At 18¢ that is about 555 contracts, paying $556 (5.56x) if Yes happens. Venue fees and price slippage on larger orders are not included.

Why do the venues show different prices?

Each venue has its own traders, fees and order book. Contracts can also settle on slightly different terms, which is why each row lists how closely the rules match.

Is a price gap an arbitrage?

Only when you can buy Yes on one venue below what someone pays for Yes on the other, after fees, and both contracts settle the same way. We show the executable bid and ask so you can check.

How fresh are these prices?

Venue prices refresh every few minutes, and the order book and live quotes stream continuously. Each venue’s card shows when we last observed it.

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