He proposed 'Ocho Dan Shiru' in his main writing "Ken Jodo Shinjitsu-kyo Gyosho Monrui (Selected passages revealing the true teaching, practice and attainment of the Pure Land), which he finished writing in 1274.
1247年に完成させた主著『顕浄土真実教行証文類』では「横超断四流」を提唱している。