
Seibu Lions won the "Nippon Life Interleague Series 2026," achieving their first championship in the 21st edition of the tournament.
Seibu Lions With their first championship, Pacific League has now seen every team in the league win a title. Led by Softbank Hawks with nine championships, Lotte and Orix Buffaloes have each won twice, while Nippon-Ham, Rakuten Eagles, and Seibu Lions have each won once.
Central League teams, which typically struggle in interleague play, have won the most championships, with The Giants and Yakult having two each. DeNA won once, in 2023. With Seibu Lions 's victory, only three teams remain without an interleague championship: Hanshin Tigers, Chunichi, and Hiroshima.