Decorative kofun are mural tombs in Japanese traditional culture. There are more than 700 decorative kofun ,among which round motifs are the most common ,indicating that it is a phenomenon that should not be ignored. Kofun with round motifs are mostly seen in Kumamoto and Fukuoka. The main forms of round motifs are: circle, concentric circle, swirl and wheel like shapes. Kofun are decorated with single motif or mixed motifs. The round motifs are strongly religious and mediumistic while the mirror theory and the sun theory are most popular. The variants such as swirl motifs suggest the symbolic relationship between round motifs and the eyes should deserve attention. Through the narration of "gods coming from the eyes "in early Japanese culture and Jyoumon clay-idol ,we can investigate the symbolic meaning of round motifs in preventing evil and in the regeneration of life. At the same time ,the round motifs used as the sign of the eyes are closely related to the Sun-God belief. As the most common decorative motif in the kofun murals ,it is a metaphor for the existence of the East Asian cultural community based on the myth thinking.