- Titles: 伊渡山親雲上 (Idoyama peechin)
- Japanese: 向 廷翼 (Shou Teiyoku)
He was of some distant relation to Prince Shô Kô (d. 1610), and while in Japan in 1790 dedicated a pair of wooden plaques, bearing a poetic couple in Idoyama's own calligraphy, to the temple of Seiken-ji, where the Prince is buried. They remain in the temple's collection today.
- Shirarezaru Ryûkyû shisetsu 知られざる琉球使節, Fukuyama-shi Tomonoura rekishi minzoku shiryôkan (2006), 88.