The 2019 Japan Series was the championship series of Nippon Professional Baseball's (NPB) 2019 season. The 70th edition of the Japan Series, it was played from 19-23 October. The series was a best-of-seven playoff between the Fukuoka SoftBank Hawks, the Pacific League's (PL) Climax Series champion and defending Japan Series champions, and the Yomiuri Giants, the Central League's (CL) Climax Series champion. The Hawks defeated the Giants in a four game sweep to win their third consecutive Japan Series championship, their fifth title in six years; they are also the first team to win three straight Japan Series titles since the Seibu Lions did it from 1990 to 1992.

The 2019 Pacific League Climax Series (PLCS) was a post-season Climax Series playoff consisting of two consecutive series that determined which of the three teams who finished in the top three during the 2019 regular season would represent the Pacific League in the Japan Series. The First Stage was a best-of-three series played between the second-place hosts Fukuoka SoftBank Hawks and the third-place Tohoku Rakuten Golden Eagles. The series was played between October 5 to 7. The Hawks defeated the Eagles 2–1 and advanced to the Final Stage to face the pennant-winning Saitama Seibu Lions.