Shun Yamaguchi threw two-run ball over eight innings and the Yokohama BayStars broke out the bats to wallop the Yomiuri Giants 10-2 for their first victory of the 2015 regular season on Saturday afternoon.

Takayuki Kajitani went 4-for-5 with three RBIs and Jose Lopez hit a two-run homer in the 12-hit onslaught. Yamaguchi scattered six hits, struck out eight and walked two in front of a crowd of 42,369 mostly Giant fans at Tokyo Dome.

"Everyone contributed, truly a team effort. It was definitely better than we expected," said BayStars skipper Kiyoshi Nakata, whose team lost 3-2 to the Giants on Opening Day the previous night.