Masahiro Yamamoto turned in a vintage performance on the mound to lead the Chunichi Dragons past the Yokohama BayStars 1-0 on Monday at Nagoya Dome.
The 46-year-old Yamamoto (2-0) allowed two hits, struck out five and walked none over seven shutout innings against the last-place BayStars.
Setup man Takuya Asao worked the eighth and closer Hitoki Iwase nailed down his 11th save of the season in the ninth.