Engetsu Island

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Coordinates: 33°41′24″N 135°20′11″E / 33.69000°N 135.33639°E / 33.69000; 135.33639

Engetsu Island

Engetsu Island (円月島, Engetsu-tō) is a small island off the coast of Shirahama, Wakayama Prefecture, Japan. It includes a natural arch through which seawater passes. The hole in the middle of the island has been formed through the effects of wind and waves over time and has given it its nickname of Engetsu (full moon).[1] Its official name is Takashima (高嶋), and it is approximately 35 metres (115 ft) east-to-west, 130 metres (430 ft) north-to-south, and 25 metres (82 ft) high at the tallest.[2]

The island is largely formed of sandstone and has become less stable over time. Since July 2009, the Shirahama town government has cautioned against approaching the island because of the risk of collapse of the arch.[3]


  1. ^ "Engetsu Island - Wakayama Travel Guide | Planetyze". Planetyze. Retrieved 2017-08-16.
  2. ^ "Seeing the sights of Japan, Temples, The World Heritage - at Wakayama Prefecture of Japan". Wakayama Tourism Federation. January 10, 2011. Retrieved March 2, 2011.
  3. ^ Engetsu-tō warning page, Shirahama town government (in Japanese) (Translate to English: Google, Bing)