Kanmurijima (冠島) is an island in the Sea of Japan administered under Maizuru in Kyoto Prefecture. It is about 2 km from Kutsujima, a similar smaller island. Nakatsu reef (中津ぐり, Nakatsu-guri) is located just midway between islands. A breeding ground for streaked shearwaters, the island was designated a Japanese natural monument (天然記念物, tennen-kinenbutsu) in 1924. It has also been recognised as an Important Bird Area (IBA) by BirdLife International. Currently, the island is designated as Kanmurijima-Kutsujima wildlife protection area and any landing is prohibited. The recreational diving service is available though.
Nickname: Oshima or Yushima
|Location||Sea of Japan|
|Area||0.223 km2 (0.086 sq mi)|
|Length||1.3 km (0.81 mi)|
|Width||0.5 km (0.31 mi)|
|Coastline||4 km (2.5 mi)|
|Highest elevation||169.7 m (556.8 ft)|
According to records of Tango no kuni fudoki, Kanmurijima and Kutsujima are the remains of a much larger island which submerged following an earthquake in 701 A.D. The topography of the seafloor seems to support the claim, as the steep 60-metre cliff is located underwater off the eastern coast of Kanmurijima and Kutsujima, indicating a recent crustal fault.
- "Kanmurijima and Kutsujima islets". BirdLife Data Zone. BirdLife International. 2021. Retrieved 27 January 2021.
- kanmurijima.com 大型高速ダイビングボートで音海港より冠島まで２５分、アサグリまで１５分、音海ポイントなら５分でご案内
- Kyoto Prefecture (in Japanese).