NPB Champion is a sports series on Kalshi, with markets like “Will Tohoku Rakuten Golden Eagles win the Japan NPB?”. The Kalshi Eye archive lists 12 of its markets and has 13 days of daily Parquet files from October 12, 2026 to October 24, 2026 (14 MB), with every order book change and trade.

Venue: Kalshi, series KXNPB
Category: Sports
Markets: 12 (0 settled, 12 open)
Files: 13 days, October 12, 2026 to October 24, 2026, 14 MB, 1,088,210 rows
Datasets: Order book (L2, incremental), Order book snapshots (top 10, 1 second), Top of book (every change), Top of book (1-minute bars), Trades

Open NPB Champion in Markets to see every day and market, then export the days you need. Free sample files of each dataset are on the Kalshi data page.

Reading the files

Every KXNPB trade on October 24, 2026, in DuckDB:

SELECT ts_recv, ticker, yes_price, size, taker_side
FROM 'kalshieye-data/trades/date=2026-10-24/series=KXNPB/trades-KXNPB-2026-10-24.parquet'
ORDER BY ts_recv;

To test a strategy on this series, see How to backtest Kalshi markets.

Related Kalshi series

Boxing Match Champion (KXBOXING): 152 markets, 13 days of files
College Football FCS Champion (KXNCAAFFCS): 128 markets, 13 days of files
NPB Spread (KXNPBSPREAD): 128 markets, 9 days of files
Japan NPB Game (KXNPBGAME): 104 markets, 9 days of files
NBA Social Justice Champion (KXNBASJC): 75 markets, 13 days of files
Men's College Basketball Tournament Champion (KXMARMAD): 73 markets, 13 days of files

Figures through October 24, 2026. All Kalshi series with pages are listed on Kalshi series.