Ginjiro Sumitani hit a tiebreaking solo homer in the seventh inning as the Seibu Lions edged the Tokyo Yakult Swallows 3-2 on Saturday afternoon.
Seibu won its third straight in interleague play and returned to .500 for the season.
The Swallows took a 2-0 lead in the first inning, which featured an RBI single by Wladimir Balentien, and Masanori Ishikawa kept his shutout alive until Hiroyuki Nakajima teed off the left-hander with a game-tying two-run blast in the sixth at Seibu Dome.