Eison, in the Kamakura period, was originally belonged to the Shingon Sect, but later learned the doctrines of the Ritsu Sect introduced by Jianzhen to found the Shingon Ritsu Sect by combining the doctrines of both sects.
鎌倉時代の叡尊は元々真言宗僧であったが、後に鑑真が伝えた律宗を学んで両者を統合した真言律宗を起こした。