八はっ角かく墳ふんはっかくふんMeanings1nounoctagonal burial moundhistorical termHistorical term for an octagonal-shaped burial mound built during the Kofun period (ca. 3rd–7th century).八はっ角かく墳ふんは古こ墳ふん時じ代だい後こう期きの有
