As scheduled, he went up Mt. Tendai and studied Tendai doctrine under Tao-sui (the seventh leader of Tendai sect; his year of birth and death unknown) and received Bosatsu-kai (Bodhisattva Precepts) of Engyo (Perfect Teaching) and came back to Japan next year (in 806).
予定通り天台山にのぼり、台州龍興寺において道邃（天台宗第七祖。生没年不明）より天台教学を学び、円教（天台宗）の菩薩戒を受けて、翌年（806年）帰国した。