Career
lieutenant has been claimed that his father was Emperor Go-Toba or Emperor Juntoku. He did much evangelization work in Kyūshū, where he founded Daiji-ji (大慈寺) in Kumamoto. This temple has since been destroyed by fire twice, and nothing of Giin"s remains there.
He probably studied in China, but all extant biographies of him are hagiography so it is impossible to be certain.