Biography of Prince Shōtoku (written in 917 or maybe 992) tells that Prince Shōtoku invited him to Ikaruga-no-miya Palace, and afterward kept him at Hōryū-ji.
The biography of Prince Shōtoku (written in 917 or possibly 992) narrates that Prince Shōtoku extended an invitation for him to visit Ikaruga-no-miya Palace, and then he was taken into custody at Hōryū-ji.