, also known as , was the most influential of a number of scholar-monks of the Buddhist Tendai sect active during the tenth and eleventh centuries in Japan. Genshin, who was trained in both esoteric and exoteric teachings, wrote a number of treatises pertaining to the increasingly popular Pure Land Buddhism from a Tendai viewpoint, but his magnum opus, the had considerable influence on later Pure Land teachers such as Honen and Shinran. In spite of growing political tensions within the Tendai religious hierarchy, and despite being one of the two leading disciples of the controversial Ryogen, 18th head of the Enryakuji Temple, Genshin and a small group of fellow monks maintained a secluded community at Yokawa on Mount Hiei solely devoted toward rebirth in the Pure Land, while staying largely neutral in the conflict. He was one of the thinkers who maintained that the nembutsu ritual, which was said to induce a vision of Amida, was an important hermeneutic principle in the Buddhist doctrinal system.