The Seibu Lions moved a full game ahead of the Hokkaido Nippon Ham Fighters on Tuesday as Takayuki Kishi won his 10th game of the season in a crucial battle between the Pacific League's top two teams at Sapporo Dome.
Kishi (10-9) allowed two runs in seven innings as the Lions overcame a two-run deficit to beat the Fighters 6-3.
The visitors tied it in the fourth on RBI singles by Jose Ortiz and Ginjiro Sumitani, and took the lead in the sixth on Sumitani's second straight run-scoring single.