Kazuhiro Kiyohara hit a three-run home run as the Central League's front-running Yomiuri Giants beat the Yokohama BayStars 4-2 at Yokohama Stadium on Tuesday and extended their winning streak to three.
Kiyohara's ninth homer of the season followed two walks after two outs in the first inning.
Hideki Matsui smashed his league-leading 26th homer of the season in the fourth inning for the Giants.