According to some old documents at Ryoun-ji Temple, the Imperial Prince Yasuhito let his second son enter into the priesthood and sent him to study under Fumyo kokushi (the Most Reverend Priest) who established Kyoto Shokoku-ji Temple.
龍雲寺古文書では康仁親王は次男を出家させ京都相国寺を創建した普明国師の元で修行をさせる。