| 1990 NPB season | |
|---|---|
| League | Nippon Professional Baseball |
| Sport | Baseball |
| Regular season | |
| Season MVP | CL: Masaki Saito (YOM) PL: Hideo Nomo (KIN) |
| League postseason | |
| CL champions | Yomiuri Giants |
| CL runners-up | Hiroshima Toyo Carp |
| PL champions | Seibu Lions |
| PL runners-up | Orix Braves |
| Japan Series | |
| Champions | Seibu Lions |
| Runners-up | Yomiuri Giants |
| Finals MVP | Orestes Destrade (SEI) |
The 1990 Nippon Professional Baseball season was the 41st season of operation for the league.
| Central League [1] | G | W | L | T | Pct. | GB |
|---|---|---|---|---|---|---|
| Yomiuri Giants | 130 | 88 | 42 | 0 | .677 | – |
| Hiroshima Toyo Carp | 132 | 66 | 64 | 2 | .508 | 22.0 |
| Yokohama Taiyo Whales | 133 | 64 | 66 | 3 | .492 | 24.0 |
| Chunichi Dragons | 131 | 62 | 68 | 1 | .477 | 26.0 |
| Yakult Swallows | 130 | 58 | 72 | 0 | .446 | 30.0 |
| Hanshin Tigers | 130 | 52 | 78 | 0 | .400 | 36.0 |
| Pacific League [2] | G | W | L | T | Pct. | GB |
|---|---|---|---|---|---|---|
| Seibu Lions | 130 | 81 | 45 | 4 | .643 | – |
| Orix Braves | 130 | 69 | 57 | 4 | .548 | 12.0 |
| Kintetsu Buffaloes | 130 | 67 | 60 | 3 | .528 | 14.5 |
| Nippon-Ham Fighters | 130 | 66 | 63 | 1 | .512 | 16.5 |
| Lotte Orions | 130 | 57 | 71 | 2 | .445 | 25.0 |
| Fukuoka Daiei Hawks | 130 | 41 | 85 | 4 | .325 | 40.0 |
PL Seibu Lions (4) vs. CL Yomiuri Giants (0)
| Game | Date | Score | Location | Time | Attendance |
|---|---|---|---|---|---|
| 1 | October 20 | Seibu Lions – 5, Yomiuri Giants – 0 | Tokyo Dome | 2:58 | 46,008 [3] |
| 2 | October 21 | Seibu Lions – 9, Yomiuri Giants – 5 | Tokyo Dome | 3:36 | 46,153 [3] |
| 3 | October 23 | Yomiuri Giants – 0, Seibu Lions – 7 | Seibu Lions Stadium | 2:48 | 31,804 [3] |
| 4 | October 24 | Yomiuri Giants – 3, Seibu Lions – 7 | Seibu Lions Stadium | 3:15 | 31,804 [3] |