On January 23, 813, Taihan, along with Saicho and others, did receive the succession ritual of the Womb Realm from Kukai at Takaosan-ji Temple (Jingo-ji Temple), and thereafter became a disciple of Kukai.
同年12月14日、泰範は高雄山寺(後の神護寺)で空海に胎蔵界灌頂を最澄らと共に受け、これ以後空海に師事した。