He studied volume 4 of "Shakumakaenron" at the age of 17, "Kusharon" (sutra of the Kusha sect) at the age of 19, and "Daijokishinron" (the Awakening of Faith in Mahayana) at the age of 20.
17歳で『釈摩訶衍論』第4、19歳で『倶舎論』、20歳で『大乗起信論』を学ぶ。