| 1978 NPB season | |
|---|---|
| League | Nippon Professional Baseball |
| Sport | Baseball |
| Regular Season | |
| Season MVP | CL: Yutaka Enatsu (YAK) PL: Hisashi Yamada (HAN) |
| League Postseason | |
| CL champions | Yakult Swallows |
| CL runners-up | Yomiuri Giants |
| PL champions | Hankyu Braves |
| PL runners-up | Kintetsu Buffaloes |
| Japan Series | |
| Champions | Yakult Swallows |
| Runners-up | Hankyu Braves |
| Finals MVP | Katsuo Osugi (YAK) |
The 1978 Nippon Professional Baseball season was the 29th season of operation for the league.