It was the pioneering work of Senshu Nenbutsu (the Single-Minded Recitation of the Nenbutsu) and transmitted the purer Jodo-kyo Buddhism of the Tendai sect, so that it can be said to have the advanced form and content of the later Jodo and Jodo Shinshu sects.
専修念仏の先駆であり、より純粋な天台系の浄土教仏教を伝えており、その後の浄土宗や浄土真宗の先行的形態と内容を持つともいえる。