When Tendai daishi Chigi, who is said to be the founder of Tendai Sect in China, advocated Kyoso hanjaku (also called Kyohan for short) based on Goji hakkyo, in which he systemized Buddhism as a whole according to the doctrine of Hokke-kyo sutra, Esoteric Buddhism had not yet been introduced and therefore, it was not included in Kyohan.
当初、中国の天台宗の祖といわれる天台大師智顗が、法華経の教義によって仏教全体を体系化した五時八教の教相判釈（略して教判という）を唱えるも、その時代はまだ密教は伝来しておらず、その教判の中には含まれていなかった。