Tetsuto Yamada drove in five runs, including four with a game-breaking sixth-inning grand slam as the Tokyo Yakult Swallows beat the Yomiuri Giants 9-6 in the Central League on Saturday.
The loss was the second of the season for the CL champion Giants.
The Swallows opened the scoring in the first at Jingu Stadium on back-to-back doubles by Tomotaka Sakaguchi and Yamada off Giants lefty Kazuto Taguchi. Yamada scored on a single by Naomichi Nishiura.