also: だじょうほうおう
noun
cloistered emperor; ex-emperor who has become a monk
Historical title for a retired emperor who has taken Buddhist vows. Used in contexts of Japanese imperial history.
白河上皇は後に出家して太上法皇となった。
Emperor Shirakawa later entered the priesthood and became a cloistered emperor.
太上法皇は院政を行った。
The cloistered emperor ruled from behind the scenes.
From 太上 (retired emperor) + 法皇 (monk-emperor). The term emerged in the Heian period when retired emperors took Buddhist vows while retaining political influence.