| Princess Reishi | |
| Succession: | Empress consort of Japan |
| Reign: | 1108–1134 |
| Succession1: | Grand empress dowager of Japan |
| Reign1: | 1134–1144 |
| Consort: | yes |
| Royal House: | Imperial House of Japan |
| Father: | Emperor Shirakawa |
| Mother: | Fujiwara no Kenshi (1057–1084) |
| Birth Date: | 1078 |
Princess Reishi (1078–1144) was the empress of her nephew Emperor Toba of Japan.
She was the daughter of Emperor Shirakawa and Fujiwara no Kenshi (1057–1084). Her father abdicated in favor of her brother in 1087. In 1107, her brother Emperor Horikawa died and was succeeded by her four-year-old nephew, Emperor Toba. She was appointed to serve ceremoniously as the empress of her nephew in 1108.
In 1130, she ordained as a Buddhist nun.[1]