The iron Inariyama burial-mound sword (稲θ·ε±±ε€ε’³εΊειε£, inariyama kofun shutsudo tekken) or kinsakumei tekken (ιι―ιιε£) was excavated in 1968 at the Inariyama Kofun, a megalithic tomb located in Saitama Prefecture. In 1978, X-ray analysis revealed a gold-inlaid inscription that comprises at least 115 Chinese characters. This sword was described as the discovery of the century for the study of ancient Japanese history. The sword is designated a national treasure of Japan and is on display in the Saitama Prefectural Museum of the Sakitama Ancient Burial Mounds.