The idea of enmitsu-itchi 円密一致 [The identity of the essential purport of the Perfect Teaching of Tendai and Esoteric Buddhism]is the basic position of Taimitsu 台密. There are two types of enmitsu-itchi:one is the idea of rido-jii 理同事異 [The Perfect Teaching of Tendai is identical to Esoteric Buddhism in principle, but in practice each one is different], the other is the idea of rido-jido 理同事同 [The Perfect Teaching is identical to Esoteric Buddhism in both principle and practice]. Most centrally, Anne 安然 (841-898?) and Ninku 仁空 (1309-1388)emphasized the idea of rido-jii, and secondarily the two scholars referred to the idea of rido-jido too. The two scholars adopted ‘Denpo-shoja-ketsuryaku’ 伝法聖者闕略 as the idea of rido-jido, meaning “When the Buddha preached the practice of the three mysteries (sanmitsugyo 三密行) Denpo-shoja 伝法聖者 listened to the Buddha preach in his presence. But they could not record the practice of the three mysteries in a sutra (ketsuryaku 闕略), because their faculties were not mysterious.” Particularly Ninku frequently referred to ‘Denpo-shoja-ketsuryaku’, and he construted the idea of enmitsu-itchi much more solidly.