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Gunma Historic site

Sasamori Kofun

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笹森古墳

Explore a large 6th-century keyhole-shaped burial mound with an impressive stone chamber.

Sasamori Kofun
Saigen Jiro CC0 resized via Wikimedia Commons

What it is

  • A keyhole-shaped burial mound.
  • Designated a Gunma Prefecture Historic Site.
  • Estimated to be built in the late 6th century.

What to see

  • A 101-meter-long tumulus, largest in the Kabura River basin.
  • The mound has two tiers.
  • A 16-meter-long horizontal stone chamber.
  • Second largest stone chamber in Gunma Prefecture.

When to go

  • Stone chamber is open to the public once a year.

Notes written by Japan Gems from facts in Japanese Wikipedia.

Where it is

Sasamori Kofun Open in Google Maps

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