This paper examines the paintings of Ryukyuan court painter In Genryō (殷元良, Zamami Yōshō 座間味庸昌, 1718-1767) in the context of artistic and cultural exchanges within east Asia and analyzes the historical meaning of his paintings. In the late seventeenth century, several Ryukyuan court painters visited China, most prominently Go Shiken (吳師虔, Yamaguchi Sōki 山口宗季, 1672-1743) and his disciple In Genryō. Go Shiken resided in Fuzhou (福州) for four years (1704-1708), where he studied under Sun Yi (孫億, 1638-1712?), a painter almost unknown in China but famous in Ryukyu, while In Genryō went to China in the company of other royal envoys and traveled from Fuzhou to Beijing. This paper considers the closely related styles of Sun Yi and In Genryō, and the connection between the style of In Genryō and a painting style common in the Hangzhou (杭州) area.