| 1980 NPB season | |
| League: | Nippon Professional Baseball |
| Sport: | Baseball |
| Season: | Regular Season |
| Mvp: | CL Koji Yamamoto (HIR) |
| Mvp Link: | Nippon Professional Baseball Most Valuable Player Award |
| Playoffs: | League Postseason |
| Conf1: | CL |
| Conf1 Link: | Central League |
| Conf1 Champ: | Hiroshima Toyo Carp |
| Conf1 Runner-Up: | Yakult Swallows |
| Conf2: | PL |
| Conf2 Link: | Pacific League |
| Conf2 Champ: | Kintetsu Buffaloes |
| Conf2 Runner-Up: | Lotte Orions |
| Finals: | Japan Series |
| Finals Link: | 1980 Japan Series |
| Finals Champ: | Hiroshima Toyo Carp |
| Finals Runner-Up: | Kintetsu Buffaloes |
| Finals Mvp: | Jim Lyttle (HIR) |
| Finals Mvp Link: | Japan Series Most Valuable Player Award |
| Seasonslist: | List of Nippon Professional Baseball seasons |
| Seasonslistnames: | NPB |
| Prevseason Link: | 1979 Nippon Professional Baseball season |
| Prevseason Year: | 1979 |
| Nextseason Link: | 1981 Nippon Professional Baseball season |
| Nextseason Year: | 1981 |
The 1980 Nippon Professional Baseball season was the 31st season of operation for the league.
| Central League[1] | G | W | L | T | Pct. | GB | |
|---|---|---|---|---|---|---|---|
| 130 | 73 | 44 | 13 | .624 | – | ||
| 130 | 68 | 52 | 10 | .567 | 6.5 | ||
| 130 | 61 | 60 | 9 | .504 | 14.0 | ||
| 130 | 59 | 62 | 9 | .488 | 16.0 | ||
| 130 | 54 | 66 | 10 | .450 | 20.5 | ||
| 130 | 45 | 76 | 9 | .372 | 30.0 |
| Pacific League[2] | G | W | L | T | Pct. | 1st Half Ranking | 2nd Half Ranking | |
|---|---|---|---|---|---|---|---|---|
| 130 | 68 | 54 | 8 | .557 | 2 | 1 | ||
| 130 | 64 | 51 | 15 | .557 | 1 | 3 | ||
| 130 | 66 | 53 | 11 | .555 | 2 | 2 | ||
| 130 | 62 | 64 | 4 | .492 | 6 | 4 | ||
| 130 | 58 | 67 | 5 | .464 | 4 | 5 | ||
| 130 | 48 | 77 | 5 | .384 | 5 | 6 |
The Pacific League teams with the best first and second-half records met in a best-of-five playoff series to determine the league representative in the Japan Series.
Kintetsu Buffaloes won the series 3–0.
| Game | Score | Date | Location | |
|---|---|---|---|---|
| 1 | Orions – 1, Buffaloes – 4 | October 15 | Kawasaki Stadium | |
| 2 | Orions – 2, Buffaloes – 4 | October 16 | Kawasaki Stadium | |
| 3 | Buffaloes – 13, Orions – 4 | October 18 | Osaka Stadium |
See main article: 1980 Japan Series. Hiroshima Toyo Carp won the series 4–3.
| Game | Score | Date | Location | Attendance | |
|---|---|---|---|---|---|
| 1 | Carp – 4, Buffaloes – 6 | October 25 | Hiroshima Municipal Stadium | 29,037[3] | |
| 2 | Carp – 2, Buffaloes – 9 | October 26 | Hiroshima Municipal Stadium | 29,668 | |
| 3 | Buffaloes – 3, Carp – 4 | October 28 | Osaka Stadium | 17,371 | |
| 4 | Buffaloes – 0, Carp – 2 | October 29 | Osaka Stadium | 21,254 | |
| 5 | Buffaloes – 6, Carp – 2 | October 30 | Osaka Stadium | 22,287 | |
| 6 | Carp – 6, Buffaloes – 2 | November 1 | Hiroshima Municipal Stadium | 29,297 | |
| 7 | Carp – 8, Buffaloes – 3 | November 2 | Hiroshima Municipal Stadium | 29,952 |