《日本書紀》與《續日本紀》在記述隋使臣赴倭（日本）時，有不實之處，必須對史籍作批判使用，才能得其真相。從隋唐天下秩序原理看來，倭（日本）國王雖未受冊封，因為仍行朝貢之禮，猶是外臣，並非不臣，更非「敵國」。惟就禮的親疏關係言，倭（日本）國的地位（有貢無封）不如南朝時代的倭國以及朝鮮諸國家（有貢有封）。但倭（日本）國自此走向自立化，尤其是律令國家建設，則又是日本史上的一大特色。

　　　　　There are many mistakes in the descriptions of Nihon Shoki and Shokunihon Shoki about the missions dispatched to Japan during the Sui and Tang dynasties. Therefore, a critical study is particularly necessary for making use of the two books as historical materials. Though not crowned by the Chinese emperors, the Japanese princes still paid tributes to China, making themselves quasi-subjects of the chinese government. According the Chinese worldview, the status of Japan during the Sui and Tang dynasties was lower than the position of Korea, whose rulers were crowned by the Chinese authorities. Yet, in this way Japan was gaining more independence from Chinese influence, with her judicial system sophisticated.