Ken Togame (4-1) threw a one-hitter for his second shutout of the season as the Pacific League-leading Seibu Lions defeated the Nippon Ham Fighters 1-0 on Monday afternoon.
The Lions' Hideto Asamura doubled in the only run in the sixth inning as Seibu completed a three-game sweep of the Fighters at Seibu Dome in Saitama Prefecture.
Fighters rookie Yohei Kagiya (1-1), Nippon Ham's third draft pick last fall, was in and out of trouble in his first career start after 11 games in relief.