重誉記『大乗玄論二諦章私記』の発見：京都・禅林寺蔵新出文献の検討=The Discovery of Daijō genron nitaishō shiki by Chōyō: Examination of Newly Discovered Literature in the Collections of Kyoto’s Zenrinji Temple
Chōyō (–1139–1143) is known to have studied the Sanron doctrine under Kakuju (1079–1139) at Tōnan’in temple of Tōdaiji, Esoteric Buddhism under Jippan (?–1144) and Jōyō (1079–1120–) and to have believed in Pure Land Buddhism. He was an academic monk who was active during the late Heian period and resided at Kōmyōsanji temple.
His works are the Hishūkyōsōsho and Jūjūsinronsho, which are compiled in Volume 77 of the Taishō canon. Several old manuscripts of his works also exist. Several lost works can be known from inventories such as the Shoshūshōshoroku in three volumes and the Tōnan’in gozen mokuroku. From the above, he is known to have compiled many writings on Esoteric Buddhism, further based on the titles of his works written on Sanron, but no manuscripts of his Sanron writings have been found.
However recently I discovered a work on Sanron by Chōyō in the collections of Zenrinji temple. The manuscript is titled Daijō genron nitaisho shiki, and from the postscript we can know it was written by Chōyō and copied by Chōzen (1227–1307). This text is a commentary on the first chapter of Jizang’s (549–623) Dasheng xuenlun and many of the quotations are composed mainly of Jizang’s writtings. Comparing this with Chōyō’s Jūjūshinron, I found many similarities. As a result, the Daijō genron nitaishō shiki could definitely be presented as the work of Chōyō.
