Daisuke Matsuzaka tossed four-hit ball over seven innings and two relievers held Nippon Ham scoreless the rest of the way as the Seibu Lions downed the Fighters 1-0 at Sapporo Dome on Friday for their sixth straight win.
Matsuzaka (15-4) walked three and struck out eight batters for the win.
Closer Kiyoshi Toyoda struck out two in pitching the ninth to earn his 31st save.