In the first part of the ninth century, Ennin introduced the Nenbutsu Zanmai Ho (method of mental absorption in the Buddhist invocation) of Wutai Shan (in China) to Mt. Hiei and Genshin (priest) perfected Tendai Jodo sect by writing "Ojoyoshu" (The Essentials of Salvation).
9世紀前半に円仁が中国五台山(中国)の念仏三昧法を比叡山に伝えており、源信_(僧侶)が『往生要集』を著して天台浄土教を大成した。