| 1986 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: | Yomiuri Giants |
| Conf2: | PL |
| Conf2 Link: | Pacific League |
| Conf2 Champ: | Seibu Lions |
| Conf2 Runner-Up: | Kintetsu Buffaloes |
| Finals: | Japan Series |
| Finals Link: | 1986 Japan Series |
| Finals Champ: | Seibu Lions |
| Finals Runner-Up: | Hiroshima Toyo Carp |
| Finals Mvp: | Kimiyasu Kudoh (SEI) |
| Finals Mvp Link: | Japan Series Most Valuable Player Award |
| Seasonslist: | List of Nippon Professional Baseball seasons |
| Seasonslistnames: | NPB |
| Prevseason Link: | 1985 Nippon Professional Baseball season |
| Prevseason Year: | 1985 |
| Nextseason Link: | 1987 Nippon Professional Baseball season |
| Nextseason Year: | 1987 |
The 1986 Nippon Professional Baseball season was the 37th season of operation for the league.
| Central League[1] | G | W | L | T | Pct. | GB | |
|---|---|---|---|---|---|---|---|
| 130 | 73 | 46 | 11 | .613 | – | ||
| 130 | 75 | 48 | 7 | .610 | 0.0 | ||
| 130 | 60 | 60 | 10 | .500 | 13.5 | ||
| 130 | 56 | 69 | 5 | .448 | 20.0 | ||
| 130 | 54 | 67 | 9 | .446 | 20.0 | ||
| 130 | 49 | 77 | 4 | .389 | 27.5 |
| Pacific League[2] | G | W | L | T | Pct. | GB | |
|---|---|---|---|---|---|---|---|
| 130 | 68 | 49 | 13 | .581 | – | ||
| 130 | 66 | 52 | 12 | .559 | 2.5 | ||
| 130 | 63 | 57 | 10 | .525 | 6.5 | ||
| 130 | 57 | 64 | 9 | .471 | 13.0 | ||
| 130 | 57 | 65 | 8 | .467 | 13.5 | ||
| 130 | 49 | 73 | 8 | .402 | 21.5 |
See main article: 1986 Japan Series. Seibu Lions won the series 4–3–1.
| Game | Score | Date | Location | Attendance | |
|---|---|---|---|---|---|
| 1 | Carp – 2, Lions – 2 | October 18 | Hiroshima Municipal Stadium | 26,037[3] | |
| 2 | Carp – 2, Lions – 1 | October 19 | Hiroshima Municipal Stadium | 26,652 | |
| 3 | Lions – 4, Carp – 7 | October 21 | Seibu Lions Stadium | 31,769 | |
| 4 | Lions – 1, Carp – 3 | October 22 | Seibu Lions Stadium | 32,136 | |
| 5 | Lions – 2, Carp – 1 | October 23 | Seibu Lions Stadium | 32,395 | |
| 6 | Carp – 1, Lions – 3 | October 25 | Hiroshima Municipal Stadium | 26,107 | |
| 7 | Carp – 1, Lions – 3 | October 26 | Hiroshima Municipal Stadium | 26,101 | |
| 8 | Carp – 2, Lions – 3 | October 27 | Hiroshima Municipal Stadium | 16,828 |