Qualla: Akatsuchiyama Kofun: The Keyhole in the Hills

Akatsuchiyama Kofun: The Keyhole in the Hills: Introduction

Thu, 12 Feb 2026 00:00:00 GMT

Photo credit タペストリー, Public domain. Seen from above, the shape is unmistakable -- a keyhole cut into the hills of the Nara Basin. One end is square, the other circular, and the whole form stretches roughly 110 meters across the ridgeline of Tōdaijiyama in the city of Tenri. This is the Akatsuchiyama Kofun, a burial mound from the early Kofun period that was built to honor someone important enough to require a monument visible from the sky. The Japanese have a word for this type of tomb: zenpō-kōen-fun, meaning a keyhole-shaped tumulus, and thousands were built across the archipelago between the third and seventh centuries. Akatsuchiyama stands out among them -- not for its size, though it is substantial, but for what nine archaeological excavations since 1987 have pulled from its earth: clay coffin fragments stained with vermilion, stone bracelets, and rows of cylindrical haniwa clay figures that were found still standing upright, guarding the mound exactly where they were placed some sixteen hundred years ago.

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Image: タペストリー | Public domain

Akatsuchiyama Kofun: The Keyhole in the Hills: The Shape of Power

Thu, 12 Feb 2026 00:00:00 GMT

Photo credit Saigen Jiro, CC0. The keyhole-shaped tomb is one of ancient Japan's most distinctive architectural forms. The Akatsuchiyama Kofun sits in the southeastern part of the Nara Basin, on an east-west ridge called Tōdaijiyama, surrounded by a cluster of burial mounds known as the Tōdaijiyama Kofun Group...

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Image: Saigen Jiro | CC0

Akatsuchiyama Kofun: The Keyhole in the Hills: Sentinels in Clay

Thu, 12 Feb 2026 00:00:00 GMT

Photo credit Alexrk2, CC BY-SA 3.0. The grave goods tell the story. Excavations of the sedimentary soil on the south side of the rear mound -- where a landslide destroyed the original burial chamber -- revealed fragments of a clay coffin, traces of vermilion pigment, stone bracelets, and stone replicas of ritual ob...

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Image: Alexrk2 | CC BY-SA 3.0

Akatsuchiyama Kofun: The Keyhole in the Hills: The Wani Clan's Legacy

Thu, 12 Feb 2026 00:00:00 GMT

Photo credit Saigen Jiro, CC0. Based on the excavated remains and the tomb's position within the Tōdaijiyama group, archaeologists believe the Akatsuchiyama Kofun was built for a member of the Wani clan, one of the powerful families that dominated the Yamato heartland during the early Kofun period. The Wani we...

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Image: Saigen Jiro | CC0