The Uni-President Lions kept the Seibu Lions caged for 8 2/3 innings.
But with their backs against the wall, Tomoaki Sato and the Japan Series champions roared loudest in the end.
Sato lined a sayonara double into left-center field with two outs in the bottom of the ninth and Yoshihito Ishii beat the relay throw home as the Seibu Lions won the Asia Series title in dramatic fashion with a 1-0 win on Sunday at Tokyo Dome.