After coming back to Japan, Saicho petitioned the Emperor Kanmu to publicly approve Hokke sect as a newly independent school in addition to the traditional six sects, and after the Emperor died, he petitioned for a new assignment of nenbundo-sha and asked to add two priests in Tendai sect (one in Shana-gyo and one in Shikango (Meditation Course), respectively) as well as Nanto rokushu.
帰国後、最澄は桓武天皇に対し従来の六宗に加え、新たに法華宗を独立した宗派として公認されるよう奏請、天皇没後には年分度者の新しい割当を申請し、南都六宗と並んで天台宗の2名（遮那業・止観業各1名）を加えることを要請した。