| Country: | Japan |
| Year: | 1955 |
| Champion: | Yomiuri Giants (4) |
| Champion Games: | 92 - 37 - 1, .713, GA: 15 |
| Runnerup: | Nankai Hawks (3) |
| Runnerup Games: | 99 - 41 - 3, .707, GA: 9 |
| Date: | October 15–24 |
| Mvp: | Takehiko Bessho (YOM) |
| Fsa: | Ichirō Togawa (NAN) |
The 1955 Japan Series was the Nippon Professional Baseball (NPB) championship series for the 1955 season. It was the sixth Japan Series and featured the Pacific League champions, the Nankai Hawks, against the Central League champions, the Yomiuri Giants.
Saturday, October 15, 1955 – 2:02 pm at Osaka Stadium in Osaka, Osaka Prefecture
Sunday, October 16, 1955 – 2:00 pm at Osaka Stadium in Osaka, Osaka Prefecture
Tuesday, October 18, 1955 – 2:03 pm at Korakuen Stadium in Bunkyō, Tokyo
Friday, October 21, 1955 – 2:00 pm at Korakuen Stadium in Bunkyō, Tokyo
Saturday, October 22, 1955 – 1:01 pm at Korakuen Stadium in Bunkyō, Tokyo
Sunday, October 23, 1955 – 2:00 pm at Osaka Stadium in Osaka, Osaka Prefecture
Monday, October 24, 1955 – 2:00 pm at Osaka Stadium in Osaka, Osaka Prefecture