He is said to have been either the youngest son, the fourth son, or a younger brother of Emperor Uda, but we can gather at least that he lived during the same era with the Emperor from the fact that he became head priest in 914.
出自について宇多天皇の末子とも、第4子とも、また弟という説があり、宮司就任が914年と天皇と同時代であることは窺える。