Taihou

Empress dowager (also Dowager Empress or Empress mother) (Chinese: 皇太后; Chinese pinyin: Húang Tài Hòu, Japanese pronunciation: Kōtaigō, Korean pronunciation: Hwang Tae Hu, Vietnamese pronunciation: Hoàng Thái Hậu) was the title given to the mother of a Chinese, Japanese, Korean or Vietnamese emperor.