Katsuaki Furuki, Boi Rodriguez and Makoto Fukumoto drove in five of Yokohama's six runs in the fifth inning and the last-place BayStars routed the Yakult Swallows 7-1 on Sunday.
Yakult catcher Tomohito Yoneno allowed a runner to score from third on a passed ball in the fifth inning and -- two outs later -- Yokohama erupted for five hits to take a 6-0 lead at Yokohama Stadium.
Takuro Ishii went 2-for-3 and scored a run while Tomohide Shichino and Rodriguez both tripled to highlight the BayStars' eight-hit attack.
PACIFIC LEAGUE
Buffaloes 4, BlueWave 2
In Kobe, Koichi Isobe broke a 2-2 tie with a two-run single in the ninth inning as second-place Kintetsu held to beat Orix.