Diamond Sutra

The Diamond Sutra is the text which is the basis of the Shingon sect of Shinseism. The sect came into being at the tenth Great Convocation, when a monk named Basso came forward with what he called the "Diamond Sutra". The text appears to be mainly a reinterpretation of the Lotus Sutra. Basso claimed the Diamond Sutra was a "lost" teaching of Shinsei, though some believe Basso wrote it himself. Basso believed and taught the the Shinsei Sutra and the Tao of Shinsei were "elementary" teachings of Shinsei's, and placed all emphasis instead on the Diamond Sutra.

The leadership of the Brotherhood of Shinsei accepted Basso's followers as the Shingon sect, the first sect to be given official recognition and acceptance.