Around the spring of 1201, when Shinran was 29, he left Mt. Hiei and for the purpose of praying for the coming generations he went to Choho-ji Temple (located in present Nakagyo-ku, Kyoto City), which was founded by Prince Shotoku, and secluded himself for 100 days there.
建仁元年（1201年）の春頃、親鸞29歳の時に叡山と決別して下山し、後世の祈念の為に聖徳太子の建立とされる頂法寺（京都市中京区）へ百日参籠を行う。