Titsingh, Isaac. (1834). Annales des empereurs du japon, pp. 144–148; Brown, Delmer et al. (1979). Gukanshō, p. 299-300; Varely, H. Paul. (1980). Jinnō Shōtōki, pp. 191–192.
Titsingh, p. 144; Varely, p. 191; Brown, p. 264; prior to Emperor Jomei, the personal names of the emperors were very long and people did not generally use them. The number of characters in each name diminished after Jomei's reign.
