Princess Teishi
| Teishi | |
|---|---|
| Empress consort of Japan | |
| Tenure | 1037–1051 |
| Empress dowager of Japan | |
| Tenure | 1051–1068 |
| Grand empress dowager of Japan | |
| Tenure | 1068–1094 |
| Born | August 15, 1013 |
| Died | February 3, 1094 (aged 80) |
| Spouse | |
| Issue |
|
| House | Imperial House of Japan |
| Father | Emperor Sanjō |
| Mother | Fujiwara no Kenshi |
Princess Teishi (禎子内親王, Teishi Naishinnō; August 15, 1013 – February 3, 1094), also known as Yōmeimon-in (陽明門院), was an empress consort of Emperor Go-Suzaku of Japan. She wielded major influence during the reign of her son, Emperor Go Sanjo (1068-1073), but she was de facto ruler from 1073 to 1094, during the early reign of Emperor Shirakawa.