Yomiuri outfielder Yoshinobu Takahashi hit a double into the left-field gap in the eighth and drove in the game-winning run as the Giants snapped Hiroshima's three-game winning streak with a 7-3 victory at Hiroshima Stadium.
Yomiuri piled two more runs in the ninth, with Shinnosuke Abe's RBI double and Keiji Fukui's squeeze bunt. Takahashi also belched a solo shot in the sixth.
Starter Yusaku Iriki lasted 6 1/3 innings, allowing eight hits and fanning six batters. Tsuyoshi Jobe (1-0) picked up the win.
Dragons 5, Tigers 3
At the Nagoya Dome, Takashi Ogasawara went five-plus innings and Chunichi used six relievers to extend its winning streak to three by beating league-leading Hanshin.
Ogasawara (2-0) was superb with his ball placement, allowing five hits and fanning three hitters.
In the fifth, Masahiro Araki hit a two-out, bases-loaded single to right and Kosuke Fukudome followed with a double, giving Chunichi a 3-0 lead. The Tigers lost consecutive games for the first time this season.
BayStars 4, Swallows 0
At Jingu Stadium, Boi Rodriguez belched a grand-slam home run in the sixth and Daisuke Miura hurled a shut-out as Yokohama downed Yakult.
Miura (2-0) struck out eight batters on four hits and two walks.
PACIFIC LEAGUE
Hawks 6, Fighters 2
At the Tokyo Dome, Kenji Jojima belched a three-run shot in the first inning and Daiei held onto its early lead to beat Nippon Ham for the fifth straight game.
Daiei's Akichika Yamada (2-0) was flawless with his slider, striking out six batters in seven innings.
Michihiro Ogasawara and David Tohmas Cromer's solo home runs were the lone scores for the Fighters.