A NPB prediction market lets traders take positions on real-world NPB outcomes. Each market offers shares priced between 0¢ and 100¢, where the price represents the implied probability that the outcome occurs. You can browse all live NPB markets on this page.

There are currently 4 active NPB markets, with a combined trading volume of $318. The full list is available on this page.

The top NPB markets by volume right now are Yokohama BayStars vs. Fukuoka SoftBank Hawks, Yokohama BayStars vs. Fukuoka SoftBank Hawks, and Fukuoka SoftBank Hawks vs. Yokohama BayStars. These are typically driven by upcoming matchups, breaking injury news, and lineup confirmations.

The next scheduled NPB event with a market on Polymarket is Yokohama BayStars vs. Fukuoka SoftBank Hawks on October 24, 2026.

Each contract is priced between 0¢ and 100¢. A NPB team or player priced at 65¢, for example, means the market is implying a 65% probability that they win or hit the stated outcome. The other side trades at 35¢.

NPB markets typically cover individual game and match outcomes, season-long awards, championship futures, and player props where available. The exact mix depends on the NPB schedule and what traders are most active on at any given time — see the live list on this page for what's currently open.

Prices tend to move fastest on news that changes who is playing or how they'll perform — confirmed lineups, injury updates, suspensions, weather, and in-play developments. The 24–48 hours before a NPB event are typically the most active window for price movement.