| 1984 NPB season | |
|---|---|
| League | Nippon Professional Baseball |
| Sport | Baseball |
| Regular Season | |
| Season MVP | CL: Sachio Kinugasa (HIR) PL: Greg Wells (HAN) |
| League Postseason | |
| CL champions | Hiroshima Toyo Carp |
| CL runners-up | Chunichi Dragons |
| PL champions | Hankyu Braves |
| PL runners-up | Lotte Orions |
| Japan Series | |
| Champions | Hiroshima Toyo Carp |
| Runners-up | Hankyu Braves |
| Finals MVP | Kiyoyuki Nagashima (HIR) |
The 1984 Nippon Professional Baseball season was the 35th season of operation for the league.