| 2005 NPB season | |
|---|---|
| League | Nippon Professional Baseball |
| Sport | Baseball |
| Duration | March 26, 2005 – October 26, 2005 |
| Regular Season | |
| Season MVP | CL: Tomoaki Kanemoto (HAN) PL: Toshiya Sugiuchi (SBH) |
| League Postseason | |
| CL champions | Hanshin Tigers |
| CL runners-up | Chunichi Dragons |
| PL champions | Chiba Lotte Marines |
| PL runners-up | Fukuoka SoftBank Hawks |
| Japan Series | |
| Champions | Chiba Lotte Marines |
| Runners-up | Hanshin Tigers |
| Finals MVP | Toshiaki Imae (LOT) |
In 2005 the Nippon Professional Baseball season ended with the Chiba Lotte Marines of the Pacific League defeating the Hanshin Tigers of the Central League in a four-game sweep in the Nippon Series.