Titsingh, Isaac. (1834). Annales des emepereurs du japon, pp. 181-188; Brown, Delmer et al. (1979). Gukanshō, pp. 322-326; Varley, H. Paul. (1980). Jinnō Shōtōki, pp. 204-205.
Titsingh, p. 186; Brown, p. 324; Varley, p. 44; a distinct act of senso is unrecognized prior to Emperor Tenji; and all sovereigns except Jitō, Yōzei, Go-Toba, and Fushimi have senso and sokui in the same year until the reign of Go-Murakami.