[1][2] There are following descriptions in Yeong Ju Ji (영주지; 瀛州誌), Goryeosa, Nasanok (나사녹; 南槎録）and Tamnaraji (탐[나라]지; 耽羅志).
Also in Goryeosa, Nasanok (나사녹; 南槎録), and Tamnaraji (탐[나라]지; 耽羅志), Byeoknangguk (벽낭; 碧浪国) was explained as Japan and a girl who come from that country.
One day, they were looking at Tan na mountain (탄나산; 漢拏山) and discovered a box that flowed from the North Sea.
As they opened it, there were messenger, beautiful three princesses, farm animals and five grain seeds in the box.
Three gods greeted them as their wives and started cultivating industries and five crops to make a village.