Chen Wei-yin strolled through eight shutout innings as the first-place Chunichi Dragons defeated the Hiroshima Carp for the 10th straight time, 10-1 on Tuesday.
Chen (12-10) scattered seven hits and walked one as the Dragons moved a season-high 18 games over .500.
Masahiro Araki and Masahiko Morino drove in three runs each for Chunichi, which had 17 hits.
BayStars 6, Tigers 3
PACIFIC LEAGUE
Eagles 9, Fighters 0
At Sapporo Dome, Teppei Tsuchiya went 5-for-5 and Takeshi Yamasaki homered and drove in four runs as Tohoku Rakuten clobbered Hokkaido Nippon Ham with 16 hits.
Satoshi Nagai (9-10) pitched his first shutout of the season for the victory.
The Fighters, who managed only four hits off Nagai, were blanked for the second straight game.
Buffaloes 3, Lions 2
At Osaka's Kyocera Dome, Chihiro Kaneko (16-7) won his 12th consecutive start to collect his PL-leading 16th victory as Orix ended Seibu's three-game winning streak.
Kaneko held the Lions to two runs in seven innings, giving up five hits.
Mitsutaka Goto and Alex Cabrera each had a solo home run for Orix, which stopped a two-game skid.
Marines 5, Hawks 4 (11)