The council of regents that formed in order to handle this challenge and manage the country on the king's behalf soon grew into an established and powerful government organ.
Shō Gen died in 1571, but the Council remained, acting alongside the successive kings in managing the affairs of government.
[1] Over time, the Sanshikan eclipsed the power and prestige of the sessei, a post which is often translated as "prime minister," and which served as chief royal advisor.
The Fifteen advised the higher-ranking officials on policy, and made recommendations to fill vacancies in the administration.
The Sanshikan was dismantled along with the rest of the royal government when Ryūkyū was formally annexed by Meiji Japan in the 1870s.