This document, a collection of memoirs of 45 persons who reached the celestial realm and became Buddha, including Prince Shotoku, Imperial family members, Buddhist monks, and laypersons, was compiled based on Yasutane's worship of the Pure Land.
この書は、聖徳太子をはじめとして、皇族から僧・庶民にいたる計45人の極楽往生の伝記を載せ、保胤の浄土信仰に基づいて編纂されたものである。