The First Sho Dynasty succeeded in unifying the Ryukyus but it was, unfortunately, politically unstable. During the dynasty there were a number of revolts such as the Gosamaru / Amawari Revolt.
For his role in the conquest of the Hokuzan kingdom with Sho Hashi, a man named Gosamaru was given rule over the central part of the Okinawa mainland during the reign of King Sho Taikyu (1454-1460).
Around that time an ambitious man named Amawari had gained power on the Katsuren Peninsula. King Sho Taikyu arranged a strategic marriage between Amawari and his daughter Momotofumi Agari, but it failed to appease ambitions. Amawari informed King Sho Taikyu that Gosamaru, the Aji (regional ruler) of Nakagusuku, was planning to usurp the king, and sought permission from the king to attack Gosamaru. Amawari then planned to attack the king himself. But Princess Momotohumi Agari and a vassal named Oni Ogusuku saw through his plan and Amawari and Katsuren Castle were destroyed.
This is as far as the official history records go, but there is much unknown and various opinions about what really took place.
