송서
The 488 CE "Song Shu" 宋書 "Book of Song" covers the brief history of the Liu Song Dynasty (420–479). Under the "Eastern and Southern Barbarians" 夷蠻 section, Japan is called "Wōguó" 倭國, Japanese "Wakoku", and said to be located off Goguryeo. In contrast with the earlier histories that describe the Wa as a 人 "people", this Song history describes them as a 國 "country".