The 2023 Pacific League Climax Series (PLCS) was a set of two consecutive playoff series in Nippon Professional Baseball (NPB). The first stage began on October 14 and the final stage concluded on October 21. The first stage was a best-of-three series between the second-place Chiba Lotte Marines and the third-place Fukuoka SoftBank Hawks. The final stage was a best-of-six with the Orix Buffaloes, the Pacific League champion, being awarded a one-win advantage against the Marines, the winner of the first stage. The Buffaloes advanced to the 2023 Japan Series to compete against the Hanshin Tigers, the 2023 Central League Climax Series winner. This is the third straight year that the Orix Buffaloes have won the Climax Series.