Yoshio Itoi doubled in the game-winning run in the bottom of the ninth inning as the Hokkaido Nippon Ham Fighters beat the Seibu Lions 4-3 on Sunday.
With the second-place Lions' loss, the Fukuoka Softbank Hawks clinched their first Pacific League title since 2003. The Hawks lost to the Tohoku Rakuten Golden Eagles in Sendai later in the day.
Itoi doubled off the left-field wall off Brian Sikorski (2-5) with one out in the ninth, scoring Hichori Morimoto from second base at Sapporo Dome.