Concerning the relation between the perfect precepts (enkai 円戒) and the samaya precepts (samayakai 三昧耶戒) goes back to the time of the renewal of vows. An oral tradition relates the perfect sudden vows to the rihimitsu 理秘密 (“theoretical truth within mysticism”), and the samaya vows to the jiri kumitsu 事理俱密 (“juxtaposition of both theory and practice within mysticism”). This goes back to Ennin 円仁. It is not only the secret oral transmission of the 14th c. Tendai priest Kōshū 光宗 (1276–1350), but also is found in various records. This oral tradition is also given authority by the circumstances gathered together in the legends of Tendai monks gathered by Enchin 円珍 (814–891). However, Ninkū 仁空 (1309–1388) belonged to a different sect, and criticized the precept ordination. Naturally, this oral tradition, the jiri kumitsu and the Tendai monk legends do not record this. However, beside the tradition of Ninkū the matter is transmitted, and these oral traditions go back to Tankū 湛空 (1176–1253). The development of the precept consecration relies on an oral transmission from Tankū and spread far and wide.
