In July and August 812, as a result of Saicho having fallen ill, he was appointed the head priest of all of Mt. Hiei, but internal strife among the clergy of the mountain (Taihan irritated the clergy with his personal inconveniences, so he asked Saicho for a leave of absence, and permission to depart from the mountain) caused him to seclude himself from the world on Takashima island in Omi Province.
弘仁3年6月最澄の病気により比叡山総別当に任じられるが、山内の紛争（泰範は自身の不都合により衆僧に迷惑をかけた」という理由で最澄に休暇を願い出ている）により近江国髙島に隠遁した。