| Country: | Japan |
| Year: | 1951 |
| Champion: | Yomiuri Giants (4) |
| Champion Games: | 79 - 29 - 6, .731, GA: 18 |
| Runnerup: | Nankai Hawks (1) |
| Runnerup Games: | 72 - 24 - 8, .750, GA: 18.5 |
| Date: | October 10–17 |
| Mvp: | Fukashi Minamimura (YOM) |
The 1951 Japan Series was the Nippon Professional Baseball (NPB) championship series for the 1951 season. It was the second Japan Series and featured the Pacific League champions, the Nankai Hawks, against the Central League champions, the Yomiuri Giants.
Wednesday, October 10, 1951 – 2:02 pm at Osaka Stadium in Osaka, Osaka Prefecture
Thursday, October 11, 1951 – 2:01 pm at Osaka Stadium in Osaka, Osaka Prefecture
Saturday, October 13, 1951 – 2:00 pm at Korakuen Stadium in Bunkyo, Tokyo
Tuesday, October 16, 1951 – 2:00 pm at Korakuen Stadium in Bunkyo, Tokyo
Wednesday, October 17, 1951 – 2:03 pm at Korakuen Stadium in Bunkyo, Tokyo