"Omorosoushi"
This is a collection of the oldest ballads and songs compiled from the Okinawa and Amami Islands. In total there are 1,248 poems and songs comprising 22 volumes. The first volume was compiled in 1531, the second in 1613, and volumes 3-22 in 1623. In 1973 it was designated as a National Important Cultural Property.
Okinawa Prefectural Museum Collection