Sakitama Historic Site Museum

Sakitama Historic Site Museum stands adjacent to the Sakitama Ancient Tomb Cluster, one of the most important archaeological sites of the Kofun period in Japan, and is renowned worldwide for housing the National Treasure iron sword with gold-inlaid inscription (Kinsakumei Tekken) — one of the most significant sword discoveries in Japanese history.

The centerpiece of the collection is the National Treasure Kinsakumei Tekken, unearthed in 1968 from Inariyama Tomb (late 5th century). The sword — 73.5 cm in total length — bears 115 characters of gold-inlaid inscription on both sides, including an explicit reference to "Wakatakeru no Ōkimi" (Emperor Yūryaku). This inscription, dating to the 5th century, provided decisive evidence for understanding political authority in the Kofun period at a time when written records were scarce. The blade itself reflects continental forging techniques and represents a crucial link in the lineage of Japanese sword-making.

The Sakitama Ancient Tomb Cluster, built by powerful clans of Musashi Province from the late 5th through 7th centuries, is one of the largest concentrations of burial mounds in Japan. The museum displays numerous excavated artifacts including weapons, horse trappings, and ornaments, giving visitors a vivid picture of warrior culture in proto-historic Japan — the cultural seedbed from which the samurai tradition would eventually emerge.

Set within a spacious archaeological park in rural Saitama, the museum offers a contemplative encounter with the earliest chapters of Japanese sword history and ancient political power.