[From Samguk yusa] 
Historical Record of the Three Kingdoms, 1146, compiled by the historian Kim Pusik in the twelfth century

        In the fourth year of King Adalla [158 AD], there lived 
on the east coast a couple named Yôno and Seo.  One 
day the husband went to the sea to gather seaweed. Suddenly a 
rock, or a fish, carried him off to Japan.  The people 
there thought him extraordinary and made him their king.  
Wondering why her husband did not come back, Seo searched 
for him and found a pair of shoes on a rock.  No sooner had 
she climbed on the rock then it carried her away to Japan.  
The Japanese saw it, thought it strange, and reported the 
matter to the king.  The couple was thus reunited.

        At this time, the sun and moon lost their light 
in Silla.  The astrologer divined that the spirits of the 
sun and moon had left Silla for Japan, thereby causing the 
strange phenomenon.  

        King Adalla then sent an envoy to Japan to find the 
couple.  Yôno declared, "My coming to this country 
must be a wish of Heaven.  How can I leave?  Here is a roll 
of fine silk cloth woven by my wife.  Take it home and offer 
it as a sacrifice to Heaven.  Everything will be all right 
again."  The envoy reported the matter to the king, who 
offered the sacrifice to Heaven.  As expected, the sun and 
moon shone again.  

        The king placed the silk cloth in his storehouse-- 
called Kwibigo, or the Queen's Storehouse-- as a national 
treasure.  The place where he worshipped Heaven was named 
Yôngil, Welcoming the Sun, or Togiya, The Field of 
Prayer.