| Country: | Japan |
| Year: | 1983 |
| Champion: | Seibu Lions (4) |
| Champion Games: | 86-40-4 |
| Runnerup: | Yomiuri Giants (3) |
| Runnerup Games: | 72-50-8 |
| Date: | October 29 – November 6 |
| Mvp: | Takuji Ota (Seibu) |
| Fsa: | Takashi Nishimoto (Yomiuri) |
The 1983 Japan Series was the 34th edition of Nippon Professional Baseball's postseason championship series. It matched the Central League champion Yomiuri Giants against the Pacific League champion Seibu Lions. The Lions won the series in seven games and captured their second consecutive Japan Series title.
| Game | Score | Date | Location | Attendance | |
|---|---|---|---|---|---|
| 1 | Lions – 6, Giants – 3 | October 29 | Seibu Lions Stadium | 32,954[1] | |
| 2 | Lions – 0, Giants – 4 | October 30 | Seibu Lions Stadium | 33,696 | |
| 3 | Giants – 5, Lions – 4 | November 1 | Korakuen Stadium | 40,279 | |
| 4 | Giants – 4, Lions – 7 | November 2 | Korakuen Stadium | 43,436 | |
| 5 | Giants – 5, Lions – 2 | November 3 | Korakuen Stadium | 43,500 | |
| 6 | Lions – 4, Giants – 3 | November 5 | Seibu Lions Stadium | 31,396 | |
| 7 | Lions – 3, Giants – 2 | November 6 | Seibu Lions Stadium | 33,242 |