조선왕조실록
Kikaijima was conquered by the Ryūkyū Kingdom. The "Haedong Jegukgi" (1471), whose source was a Japanese monk visiting Korea in 1453, describes Kikaijima as a territory of Ryūkyū. An article of 1462 in the "Annals of the Joseon Dynasty", which records an interview from a Jeju islander who had drifted to Okinawa in 1456, states that Kikaijima was resisting Ryūkyū's repeated invasions. According to the "Chūzan Seikan" (1650), King Shō Toku himself pacified Kikaijima in 1466, claiming that Kikaijima had not paid tribute for years.