This Palace became the property of the Japanese Emperors, was named "The Palace of the Isles", and was mentioned several times in the Man'yōshū, the "Collection of Countless Leaves", the oldest known collection of Japanese poetry.
Tento palác se stal majetkem japonských císařů, byl pojmenován "Palác ostrovů " a byl zmíněn několikrát v Manjóšú (万葉集), v nejstarší známé sbírce japonské poezie.