Lefty Kyohei Muranaka pitched his career first shutout, a three-hitter, leading the Central League-leading Tokyo Yakult Swallows to a 2-0 victory over the Yomiuri Giants on Friday.
Norichika Aoki homered to lead off the bottom of the first inning and Kazuhiro Hatakeyama added an RBI single the same frame at Fukushima Azuma Stadium.
Giants rookie Hirokazu Sawamura (5-8) took the loss.