Market comparison

Japan NPB Champion

2 venues · 13 outcome rows · 11 comparable lines · 0 verified parity · active

Kalshi

Open venue ↗

12 outcomes · $34K reported volume

Observed 28s ago

Recorded venue end date: Dec 15, 2026

Polymarket

Open venue ↗

23 outcomes · $18K reported volume

Observed 28s ago

Recorded venue end date: Nov 1, 2026

Check settlement rules before comparing contracts. Matched outcomes may settle differently. These venues also report end dates more than 48 hours apart; event identity does not mean the contracts close or settle together. These are stored prices; record update times do not certify live quotes. Differences exclude fees and available size.

A shared identity alone does not make a price difference executable.

Available outcome prices by venue for Japan NPB Champion
Outcome	Kalshi	Polymarket	Difference
Chiba Lotte Marines Same label, rules unverified Labels suggest the same named outcome; no persisted outcome identity or settlement parity is verified.	2.0% Bid 0.0% · Ask 2.0% Chiba Lotte Marines Open Kalshi ↗	0.0% Bid — · Ask 0.2% Chiba Lotte Marines · closed Open Polymarket ↗	2.0 pp
Chunichi Dragons Same label, rules unverified Labels suggest the same named outcome; no persisted outcome identity or settlement parity is verified.	2.0% Bid 0.0% · Ask 2.0% Chunichi Dragons Open Kalshi ↗	0.0% Bid 0.1% · Ask 0.2% Chunichi Dragons · closed Open Polymarket ↗	2.0 pp
Hanshin Tigers Same label, rules unverified Labels suggest the same named outcome; no persisted outcome identity or settlement parity is verified.	1.0% Bid 0.0% · Ask 1.0% Hanshin Tigers Open Kalshi ↗	0.0% Bid — · Ask 0.1% Hanshin Tigers · closed Open Polymarket ↗	1.0 pp
Hiroshima Toyo Carp Same label, rules unverified Labels suggest the same named outcome; no persisted outcome identity or settlement parity is verified.	2.0% Bid 0.0% · Ask 2.0% Hiroshima Toyo Carp Open Kalshi ↗	0.0% Bid — · Ask 0.1% Hiroshima Toyo Carp · closed Open Polymarket ↗	2.0 pp
Hokkaido Nippon-Ham Fighters Same label, rules unverified Labels suggest the same named outcome; no persisted outcome identity or settlement parity is verified.	20.0% Bid 0.0% · Ask 20.0% Hokkaido Nippon-Ham Fighters Open Kalshi ↗	0.0% Bid — · Ask 0.1% Hokkaido Nippon-Ham Fighters · closed Open Polymarket ↗	20.0 pp
Orix Buffaloes Same label, rules unverified Labels suggest the same named outcome; no persisted outcome identity or settlement parity is verified.	1.0% Bid 0.0% · Ask 1.0% Orix Buffaloes Open Kalshi ↗	0.0% Bid — · Ask 0.1% Orix Buffaloes · closed Open Polymarket ↗	1.0 pp
Saitama Seibu Lions Same label, rules unverified Labels suggest the same named outcome; no persisted outcome identity or settlement parity is verified.	11.0% Bid 0.0% · Ask 15.0% Saitama Seibu Lions Open Kalshi ↗	0.0% Bid — · Ask 0.1% Saitama Seibu Lions · closed Open Polymarket ↗	11.0 pp
Tohoku Rakuten Golden Eagles Same label, rules unverified Labels suggest the same named outcome; no persisted outcome identity or settlement parity is verified.	2.0% Bid 0.0% · Ask 2.0% Tohoku Rakuten Golden Eagles Open Kalshi ↗	0.0% Bid — · Ask 0.1% Tohoku Rakuten Golden Eagles · closed Open Polymarket ↗	2.0 pp
Tokyo Yakult Swallows Same label, rules unverified Labels suggest the same named outcome; no persisted outcome identity or settlement parity is verified.	3.0% Bid 0.0% · Ask 3.0% Tokyo Yakult Swallows Open Kalshi ↗	0.0% Bid — · Ask 0.1% Tokyo Yakult Swallows · closed Open Polymarket ↗	3.0 pp
Yokohama DeNA BayStars Same label, rules unverified Labels suggest the same named outcome; no persisted outcome identity or settlement parity is verified.	27.0% Bid 26.0% · Ask 35.0% Yokohama DeNA BayStars Open Kalshi ↗	28.1% Bid 23.1% · Ask 33.1% Yokohama DeNA BayStars Open Polymarket ↗	1.1 pp
Yomiuri Giants Same label, rules unverified Labels suggest the same named outcome; no persisted outcome identity or settlement parity is verified.	7.0% Bid 0.0% · Ask 28.0% Yomiuri Giants Open Kalshi ↗	0.0% Bid — · Ask 0.1% Yomiuri Giants · closed Open Polymarket ↗	7.0 pp
Fukuoka Hawks Not aligned No persisted outcome identity connects these venue contracts.	67.0% Bid 67.0% · Ask 76.0% Fukuoka Hawks Open Kalshi ↗	—	—
Fukuoka Hawks Not aligned No persisted outcome identity connects these venue contracts.	—	69.0% Bid 68.0% · Ask 70.0% Fukuoka SoftBank Hawks Open Polymarket ↗	—

Chiba Lotte Marines

Same label, rules unverified

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

Kalshi

2.0%

Bid 0.0% · Ask 2.0%

Chiba Lotte Marines

Open Kalshi ↗

Polymarket

0.0%

Bid — · Ask 0.2%

Chiba Lotte Marines · closed

Open Polymarket ↗

Price difference 2.0 pp

Chunichi Dragons

Same label, rules unverified

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

Kalshi

2.0%

Bid 0.0% · Ask 2.0%

Chunichi Dragons

Open Kalshi ↗

Polymarket

0.0%

Bid 0.1% · Ask 0.2%

Chunichi Dragons · closed

Open Polymarket ↗

Price difference 2.0 pp

Hanshin Tigers

Same label, rules unverified

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

Kalshi

1.0%

Bid 0.0% · Ask 1.0%

Hanshin Tigers

Open Kalshi ↗

Polymarket

0.0%

Bid — · Ask 0.1%

Hanshin Tigers · closed

Open Polymarket ↗

Price difference 1.0 pp

Hiroshima Toyo Carp

Same label, rules unverified

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

Kalshi

2.0%

Bid 0.0% · Ask 2.0%

Hiroshima Toyo Carp

Open Kalshi ↗

Polymarket

0.0%

Bid — · Ask 0.1%

Hiroshima Toyo Carp · closed

Open Polymarket ↗

Price difference 2.0 pp

Hokkaido Nippon-Ham Fighters

Same label, rules unverified

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

Kalshi

20.0%

Bid 0.0% · Ask 20.0%

Hokkaido Nippon-Ham Fighters

Open Kalshi ↗

Polymarket

0.0%

Bid — · Ask 0.1%

Hokkaido Nippon-Ham Fighters · closed

Open Polymarket ↗

Price difference 20.0 pp

Orix Buffaloes

Same label, rules unverified

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

Kalshi

1.0%

Bid 0.0% · Ask 1.0%

Orix Buffaloes

Open Kalshi ↗

Polymarket

0.0%

Bid — · Ask 0.1%

Orix Buffaloes · closed

Open Polymarket ↗

Price difference 1.0 pp

Saitama Seibu Lions

Same label, rules unverified

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

Kalshi

11.0%

Bid 0.0% · Ask 15.0%

Saitama Seibu Lions

Open Kalshi ↗

Polymarket

0.0%

Bid — · Ask 0.1%

Saitama Seibu Lions · closed

Open Polymarket ↗

Price difference 11.0 pp

Tohoku Rakuten Golden Eagles

Same label, rules unverified

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

Kalshi

2.0%

Bid 0.0% · Ask 2.0%

Tohoku Rakuten Golden Eagles

Open Kalshi ↗

Polymarket

0.0%

Bid — · Ask 0.1%

Tohoku Rakuten Golden Eagles · closed

Open Polymarket ↗

Price difference 2.0 pp

Tokyo Yakult Swallows

Same label, rules unverified

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

Kalshi

3.0%

Bid 0.0% · Ask 3.0%

Tokyo Yakult Swallows

Open Kalshi ↗

Polymarket

0.0%

Bid — · Ask 0.1%

Tokyo Yakult Swallows · closed

Open Polymarket ↗

Price difference 3.0 pp

Yokohama DeNA BayStars

Same label, rules unverified

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

Kalshi

27.0%

Bid 26.0% · Ask 35.0%

Yokohama DeNA BayStars

Open Kalshi ↗

Polymarket

28.1%

Bid 23.1% · Ask 33.1%

Yokohama DeNA BayStars

Open Polymarket ↗

Price difference 1.1 pp

Yomiuri Giants

Same label, rules unverified

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

Kalshi

7.0%

Bid 0.0% · Ask 28.0%

Yomiuri Giants

Open Kalshi ↗

Polymarket

0.0%

Bid — · Ask 0.1%

Yomiuri Giants · closed

Open Polymarket ↗

Price difference 7.0 pp

Fukuoka Hawks

Not aligned

No persisted outcome identity connects these venue contracts.

Kalshi

67.0%

Bid 67.0% · Ask 76.0%

Fukuoka Hawks

Open Kalshi ↗

Polymarket

—

Fukuoka Hawks

Not aligned

No persisted outcome identity connects these venue contracts.

Kalshi

—

Polymarket

69.0%

Bid 68.0% · Ask 70.0%

Fukuoka SoftBank Hawks

Open Polymarket ↗

Prices are shown as percentages of a $1 payout. “pp” means percentage points. A dash means data is unavailable.

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