YOSHISHIGE no Yasutane collected biographies of people who attained gokuraku ojo (peaceful death) by Amida worship and wrote the "Nihon ojo gokurakuki" (Japanese records of birth into the Pure Land).
慶滋保胤は阿弥陀信仰によって極楽往生を遂げたと言われる人々の伝記を集め、『日本往生極楽記』を著した。