Ennin was one of ten pupils who learned about shikan meditation (using an annotated Lotus Sutra) from Saicho, and Ennin was the only disciple who was assigned to conduct lectures in place of his master.
最澄が止観（法華経の注釈書）を学ばせた弟子10人のうち、師の代講を任せられるようになったのは円仁ひとりであった。