"Samguk Sagi" (History of the Three Kingdoms) describes in the 27th volume, the 5th section of History of Baekje, as an event that occurred in March of the ninth year of King Wu of Zhou's time (Baekje), that "in March in the spring of the ninth year, bunrinro Hai SEI, an envoy from Sui Dynasty to Wakoku (Japan), passed the south of our country," which means that he came to Japan via the southern part of Baekje.
『三国史記』卷第27百済本紀第5武王(百済)9年3月によれば「九年春三月遣使入隋朝貢隋文林郞裴淸奉使倭國經我國南路」とあり裴清は百済南部を経由したことが記述されている。