Chatan Chōai

Chatan Wōji Chōai, also known by his Chinese style name Shō Kōsai, was a prince of Ryukyu Kingdom.
Chatan was the fourth son of King Shō Shitsu, and his mother was Mafee Aji. Chatan was the first head of a royal family called Ufumura Udun.
Chatan was given Chatan magiri as his hereditary fief. Later, he served as sessei from 1689 to 1705. He was allowed to sit in litter crossing Kōfuku Gate and Ueki Gate in Shuri Castle.
Chatan Chōai died without heir in 1719. Chatan Chōki, who was the second son of King Shō Eki, became his adopted son and inherited his title.
The name "Prince Chatan" appeared in an Okinawan folktale: Mimi kiri bōzu. In this folktale, Prince Chatan was good at playing go, he killed Kurogane zasu, a Vajrayana Buddhist monk, and was cursed, all his sons died young. The prototype of "Prince Chatan" is unclear. Some scholars considered him to be Chatan Chōai, others consider Chatan Chōki, the adopted son of Chōai, to be the basis for the story.