Shō Shin
The "Omoro Sōshi" was first compiled in 1531, and again in 1613 and 1623, as part of attempts by the royal government to secure their cultural or spiritual legitimacy and power. The first compilation came just after the reign of Shō Shin, who consolidated, centralized, and reformed the government, and the second came just after Ryukyu became a direct vassal to Satsuma. At both times, cultural and ideological means, as well as more mundane political ones, were needed to ensure unity and to maintain a connection to tradition and history.