The ca. 432 CE "Book of the Later Han" () says the Wa kings lived in the country of Yamatai ():The Wa dwell on mountainous islands southeast of Han in the middle of the ocean, forming more than one hundred communities. From the time of the overthrow of Chaoxian [northern Korea by Emperor Wu (B.C. 140-87), nearly thirty of these communities have held intercourse with the Han court by envoys or scribes. Each community has its king, whose office is hereditary. The King of Great Wa [Yamato resides in the country of Yamadai. (tr. Tsunoda 1951:1)