When he was 22 or 23 years old, he entered a secluded life at Ohara in Kyoto and devoted to praying to Buddha but in the meantime, he founded Raigoin Temple (Sakyo-ku Ward, Kyoto City) and Jorengein Temple (some assert that Jakkoin Temple was also founded by Ryonin) and completed Ohara Shomyo (Buddhist liturgical chant) by unifying the divided Tendai Shomyo.
22歳から23歳のころ京都大原に隠棲して念仏三昧の一方で、来迎院(京都市左京区)・浄蓮華院を創建し（寂光院も良忍による創建説がある）、また分裂していた天台声明の統一をはかり、大原声明を完成させた。