The treatise is on the Rikkyo Kaishu (establishment of a new sect) of the Jodo sect and advocates an exclusive practice of chanting the name of the Buddha based on senchaku hongan (Selection of the Original Vow, the eighteenth vow in the forty-eight vows) and declares the independence of the sect.
選択本願（四十八願第十八願）に立脚して称名一行の専修を主張し、浄土宗の独立を宣言した、浄土宗の立教開宗の書である。