| Year: | 2018 |
| Stage1champion: | Fukuoka SoftBank Hawks (2) |
| Stage1champion Games: | 82–60–1 (.577), 6.5 GB |
| Stage1runnerup: | Hokkaido Nippon-Ham Fighters (1) |
| Stage1runnerup Games: | 74–66–3 (.529), 13.5 GB |
| Date1: | October 13–15 |
| Stage2champion: | Fukuoka SoftBank Hawks (4) |
| Stage2champion Manager: | Kimiyasu Kudo |
| Stage2champion Games: | 82–60–1 (.577), 6.5 GB |
| Stage2runnerup: | Saitama Seibu Lions (2) |
| Stage2runnerup Games: | 88–53–2 (.624), 6.5 GA |
| Date2: | October 17–21 |
| Mvp: | Yuki Yanagita (Hawks) |
| Previous Series: | 2017 Pacific League Climax Series |
| Previous Year: | 2017 |
| Next Series: | 2019 Pacific League Climax Series |
| Next Year: | 2019 |
The 2018 Pacific League Climax Series (PLCS) consisted of two consecutive series, Stage 1 being a best-of-three series and Stage 2 being a best-of-six with the top seed being awarded a one-win advantage. The winner of the series advanced to the 2018 Japan Series, where they competed against the 2018 Central League Climax Series winner. The top three regular-season finishers played in the two series. The PLCS began on with the first game of Stage 1 on October 13.