Japan Series, Japanese Nihon Shirīzu or Nippon Shirīzu, in baseball, a seven-game play-off between champions of the two professional Japanese baseball leagues, the Central League and the Pacific League. Baseball in Japan was established on a professional basis in 1934, and by 1936 seven professional teams had been organized. A system of two leagues composed of six teams each was instituted in 1950. Each 144-game season culminates in the Japan Series. The Yomiuri (Tokyo) Giants have been the dominant team in the Japan Series, with a total of 19 championships for the years 1950–2000. The next closest team, the Seibu Lions, won 11 championships over the same period.

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The table provides a list of Japan Series results.