Kangen, the first zasu (head priest) of Daigo-ji Temple, was considered to be Shobo's legal child, who accompanied by Junyu, his disciple, dedicated Kobo Daishi-go title to Oku no in (inner sanctuary) on Mt. Koya, and intended for the prosperity of the post-Kukai Shingon organization.
正嫡には、弘法大師号を弟子淳祐(僧)を伴い高野山奥の院に奉告し、空海後の真言宗団の組織興隆化を図った醍醐寺第一世座主観賢とする。