Regarding the travel routes of Seisei HAI, who was an envoy from the Sui, the book describes that he reached the coast of the territory after Tsushima (a country surrounded by the sea), Ikikoku (a country to the east of the territory), Chikushi, Shinokoku (a kingdom of Chinese people, located in the east of the territory) and other 10 or more countries.
隋使の裴世清らの道程は「都斯麻國迥在大海中又東至一支國又至竹斯國又東至秦王國其人同於華夏以爲夷州疑不能明也又經十餘國達於海岸自竹斯國以東皆附庸於俀」とあり、大海の都斯麻國（対馬）、東に一支國（一支国）、竹斯國（筑紫）、東に秦王國（中国人の国）他10余国をへて海岸についたという。