Chatan Wōji Chōai (北谷 王子 朝愛, 11 June 1650 – 11 December 1719), also known by his Chinese style name Shō Kōsai (尚 弘才), was a prince of Ryukyu Kingdom.
Chatan was the fourth son of King Shō Shitsu, and his mother was Mafee Aji (真南風按司).
[1] Chatan was the first head of a royal family called Ufumura Udun (大村御殿).
[2] The name "Prince Chatan" appeared in an Okinawan folktale: Mimi kiri bōzu (耳切り坊主, "a monk whose ears was cut off").
In this folktale, Prince Chatan was good at playing go, he killed Kurogane zasu (黒金座主), a Vajrayana Buddhist monk, and was cursed, all his sons died young.