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Gunma Historic site

Ōta Tenjin-yama Kofun

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太田天神山古墳

Explore Eastern Japan's largest keyhole-shaped kofun, a 5th-century burial mound, just a short walk from Ota Station.

Ōta Tenjin-yama Kofun
Saigen Jiro CC0 resized via Wikimedia Commons

What it is

  • A kofun, or ancient burial mound, in Gunma Prefecture.
  • Designated a National Historic Site in 1941.
  • The largest kofun in Eastern Japan.
  • Built in the 5th century.

What to see

  • A keyhole-shaped mound, 364 meters long.
  • The only kofun over 200 meters in Eastern Japan.
  • Two smaller accompanying burial mounds.
  • Located on a plateau in Ota City.

Getting there

  • 15 minutes walk from Ota Station.

Notes written by Japan Gems from facts in Japanese Wikipedia.

Where it is

Ōta Tenjin-yama Kofun Open in Google Maps

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