Although Imperial Prince Yoshihisa did not actually have an opportunity to serve as zasu of Enryaku-ji Temple on Mt. Hiei, it is not correct to say that he was not Tendai-zasu because the Tendai Sect was administered by Kanei-ji Temple, not by Enryaku-ji Temple.
ただし能久親王は実際には比叡山延暦寺座主につく機会がなかったが、江戸時代においては延暦寺ではなく寛永寺が天台宗を管轄したため、彼が天台座主でなかったというのは正確でない。