Qualla: Inariyama Kofun

Inariyama Kofun: Introduction

Mon, 16 Feb 2026 00:00:00 GMT

Photo credit Hotsuregua, CC BY-SA 3.0. One hundred and fifteen characters of gold spell out a dead man's name. Inlaid into an iron sword that had lain sealed inside a clay-wrapped coffin for fifteen centuries, the inscription on the Inariyama Sword names its owner as "Wowake" and traces his lineage back eight generations. It also names his sovereign: a figure scholars identify as Emperor Yuryaku, the powerful 5th-century ruler whose court sat hundreds of kilometers to the west in the Yamato heartland near modern Osaka. That a vassal buried in the marshlands of the Kanto Plain, far from the centers of power, carried a sword bearing his emperor's name upended long-held assumptions about how tightly the early Japanese state controlled its distant provinces. The mound that held this sword -- Inariyama Kofun -- still rises from the flat farmland of Gyoda, Saitama Prefecture, its distinctive keyhole silhouette aligned on an axis that points directly at Mount Fuji, 100 kilometers away.

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Image: Hotsuregua | CC BY-SA 3.0

Inariyama Kofun: A Keyhole in the Rice Paddies

Mon, 16 Feb 2026 00:00:00 GMT

Photo credit Myzw, CC BY-SA 4.0. Inariyama Kofun stretches 120 meters from end to end, making it the second largest tumulus in the Sakitama Kofun Cluster. From the air, its shape is unmistakable: a circular mound joined to a rectangular platform, forming the distinctive keyhole outline that defines the zenpokoen...

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Image: Myzw | CC BY-SA 4.0

Inariyama Kofun: What the Sword Said

Mon, 16 Feb 2026 00:00:00 GMT

Photo credit Ebiebi2, Public domain. Archaeologists opened the burial chamber in 1968 and found a wooden coffin wrapped in clay, resting on a bed of gravel. Inside lay the personal wealth of a powerful figure: iron swords, a bronze mirror, curved magatama jewels, silver rings, gilded metal fittings, fragments of arm...

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Image: Ebiebi2 | Public domain

Inariyama Kofun: Damage, Neglect, and Recovery

Mon, 16 Feb 2026 00:00:00 GMT

Photo credit Shiro-wanko, CC BY-SA 3.0. The mound nearly did not survive to tell its story. In 1937, workers demolishing the forward rectangular portion to use as landfill during swamp reclamation carved away a significant section before anyone intervened. The tumulus deteriorated further over the following decades, it...

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Image: Shiro-wanko | CC BY-SA 3.0

Inariyama Kofun: The View Toward Fuji

Mon, 16 Feb 2026 00:00:00 GMT

Photo credit 京浜にけ, CC BY-SA 3.0. Stand on the summit of Inariyama's circular rear mound, 11.7 meters above the surrounding plain, and on a clear day Mount Fuji materializes on the horizon a hundred kilometers to the southwest. This is not coincidence. The main axis of the tumulus is deliberately aligned toward t...

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Image: 京浜にけ | CC BY-SA 3.0