A priest of the Pure Land ( Jodo) school who lived in Kamakura in Japan during the thirteenth century.
Originally a Tendai priest, he later practiced the Pure Land teachings under Honen's disciple Jokaku and studied the doctrine of one-time recitation.
Later he followed Shoku of the Seizan branch of the Pure Land school.
In 1227, when the imperial court prohibited the practice of the Nembutsu (the recitation of Amida Buddha's name), Sasshowas banished from Kyoto.
He moved to Kamakura and eventually founded his own school, which upheld the doctrine of meditation on Amida Buddha. The details of his teachings are unknown.