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Gunma Historic site

Kannonzuka Kofun

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八幡観音塚古墳

Explore a large, ancient keyhole-shaped tomb with a massive stone chamber and excavated artifacts.

Kannonzuka Kofun
AsPJT CC0 resized via Wikimedia Commons

What it is

  • A keyhole-shaped tumulus, a National Historic Site.
  • Built as a burial mound in ancient Japan.
  • Contains a large horizontal stone chamber.

What to see

  • The 105-meter long keyhole-shaped tumulus.
  • Posterior circular part: 70 meters diameter, 12 meters high.
  • Anterior square part: 105 meters wide, 14 meters high.
  • Horizontal stone chamber is 15.8 meters long.
  • Largest stone in chamber weighs about 50 tons.
  • Excavated artifacts are Important Cultural Properties.

Notes written by Japan Gems from facts in Japanese Wikipedia.

Where it is

Kannonzuka Kofun Open in Google Maps

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