| 1984 NPB season | |
| League: | Nippon Professional Baseball |
| Sport: | Baseball |
| Season: | Regular Season |
| Mvp: | CL |
| 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: | Chunichi Dragons |
| Conf2: | PL |
| Conf2 Link: | Pacific League |
| Conf2 Champ: | Hankyu Braves |
| Conf2 Runner-Up: | Lotte Orions |
| Finals: | Japan Series |
| Finals Link: | 1984 Japan Series |
| Finals Champ: | Hiroshima Toyo Carp |
| Finals Runner-Up: | Hankyu Braves |
| Finals Mvp: | Kiyoyuki Nagashima (HIR) |
| Finals Mvp Link: | Japan Series Most Valuable Player Award |
| Seasonslist: | List of Nippon Professional Baseball seasons |
| Seasonslistnames: | NPB |
| Prevseason Link: | 1983 Nippon Professional Baseball season |
| Prevseason Year: | 1983 |
| Nextseason Link: | 1985 Nippon Professional Baseball season |
| Nextseason Year: | 1985 |
The 1984 Nippon Professional Baseball season was the 35th season of operation for the league.
| Central League[1] | G | W | L | T | Pct. | GB | |
|---|---|---|---|---|---|---|---|
| 130 | 75 | 45 | 10 | .625 | – | ||
| 130 | 73 | 49 | 8 | .598 | 3.0 | ||
| 130 | 67 | 54 | 9 | .554 | 8.5 | ||
| 130 | 53 | 69 | 8 | .434 | 23.0 | ||
| 130 | 51 | 71 | 8 | .418 | 25.0 | ||
| 130 | 46 | 77 | 7 | .374 | 30.5 |
| Pacific League[2] | G | W | L | T | Pct. | GB | |
|---|---|---|---|---|---|---|---|
| 130 | 75 | 45 | 10 | .625 | – | ||
| 130 | 64 | 51 | 15 | .557 | 8.5 | ||
| 130 | 62 | 61 | 7 | .504 | 14.5 | ||
| 130 | 58 | 61 | 11 | .487 | 16.5 | ||
| 130 | 53 | 65 | 12 | .449 | 21.0 | ||
| 130 | 44 | 73 | 13 | .376 | 29.5 |
See main article: 1984 Japan Series. Hiroshima Toyo Carp won the series 4–3.
| Game | Score | Date | Location | Attendance | |
|---|---|---|---|---|---|
| 1 | Carp – 3, Braves – 2 | October 13 | Hiroshima Municipal Stadium | 28,863[3] | |
| 2 | Carp – 2, Braves – 5 | October 14 | Hiroshima Municipal Stadium | 31,289 | |
| 3 | Braves – 3, Carp – 8 | October 16 | Hankyu Nishinomiya Stadium | 19,022 | |
| 4 | Braves – 2, Carp – 3 | October 18 | Hankyu Nishinomiya Stadium | 22,162 | |
| 5 | Braves – 6, Carp – 2 | October 19 | Hankyu Nishinomiya Stadium | 14,442 | |
| 6 | Carp – 3, Braves – 8 | October 21 | Hiroshima Municipal Stadium | 30,442 | |
| 7 | Carp – 7, Braves – 2 | October 22 | Hiroshima Municipal Stadium | 25,720 |