Yuki Yoshimura homered twice and drove in three runs, Daisuke Miura scattered eight hits over the distance, and the Yokohama BayStars routed the Chunichi Dragons 12-1 on Saturday afternoon.
The BayStars' 15 hits and 12 runs were both season highs and all of their starting nine had at least one hit in the matinee.
Yoshimura had a two-run blast off Shinji Iwata (2-1) to key a four-run first inning and went deep in his next at-bat, a solo drive as part of a three-run fourth at Yokohama Stadium.