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This article is about the 2015 Nippon Professional Baseball season only. For information on all of baseball, see 2015 in baseball.
The 2015 Nippon Professional Baseball season was the 66th season since the NPB was reorganized in 1950. In the Central League, the Yakult Swallows claimed the pennant and defeated the Yomiuri Giants in the final stage of the Climax Series. In the Pacific League, the Fukuoka SoftBank Hawks won the penant and defeated the Chiba Lotte Marines in the final stage of the Climax Series.
Note: In each league's stepladder playoff system (Climax Series), all games in that series are held at the higher seed's home stadium. The team with the higher regular-season standing also advanced if the round ended in a tie.