The 1986 Japan Series was the championship series of Nippon Professional Baseball (NPB) for the 1986 season. The 37th edition of the Series, it was a best-of-seven playoff that matched the Central League champion Hiroshima Toyo Carp against the Pacific League champion Seibu Lions. The Carp won the pennant in narrow fashion, having won two games less than the Yomiuri Giants but having four more tie games than them to pull out ahead.