, first son of regent Matsudono Motofusa, was a Kugyō (high-ranking Japanese official) of the late Heian and Kamakura periods.
Despite being first-born, he was treated as if he were not, while his stepbrother Moroie inherited the male-line. Hence, he called himself, avoiding the use of the name Matsudono. In 1220, just before the Jōkyū War, he retired from politics, becoming a Buddhist monk.
In recent years scholars have suspected that he is actually the author of .[1]