retired empress; empress emerita
Honorific title used for a former empress who has abdicated or retired. The term is specific to the Japanese imperial family and is used with the utmost respect.
See also: 上皇后
Her Majesty the Empress Emerita abdicated in the first year of Reiwa.
上皇后陛下のご健康を心よりお祈り申し上げます。
We sincerely pray for the good health of Her Majesty the Empress Emerita.
Compound of 上皇 (retired emperor) + 后 (empress) + 陛下 (Your/Her Majesty). The term was established in 2019 following the abdication of Emperor Akihito and Empress Michiko.