It developed from Kyoso Hanjaku (the evaluation of sutras) by Priest Zhiyi in China, who said that the secret of Buddhism had been taught by Shakya-muni existed in Hokke-kyo (Saddharmapundariika-sutra, the Lotus Sutra).
釈迦の説いた法の極意が法華経にあるという中国の智ギの教相判釈に基づく。