Titsingh, p. 413. 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 Emperor Go-Murakami – see Varley, H. Paul. (1980).Jinnō Shōtōki, p. 44.
