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.[2] Currently, the island is designated as Kanmurijima-Kutsujima wildlife protection area and any landing is prohibited. The recreational diving service is available though.[3]

Kanmurijima Island
Native name:
冠島 Kanmurijima
Nickname: Oshima or Yushima[1]
Kanmurijima Island is located in Japan
Kanmurijima Island
Kanmurijima Island
Location in Japan
LocationSea of Japan
Coordinates35°40′50″N 135°25′35″E / 35.68056°N 135.42639°E / 35.68056; 135.42639
Area0.223 km2 (0.086 sq mi)
Length1.3 km (0.81 mi)
Width0.5 km (0.31 mi)
Coastline4 km (2.5 mi)
Highest elevation169.7 m (556.8 ft)
PrefectureKyoto Prefecture
Ethnic groupsJapanese
View of Ama-no-Hashidate by Sesshū Tōyō. On the right, torii of Kono Shrine is seen. On extreme right, Kammurijima and Kutsujima are also painted


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.

See alsoEdit


  1. ^ 冠島・沓島(かんむりじま・くつじま)京都府舞鶴市
  2. ^ "Kanmurijima and Kutsujima islets". BirdLife Data Zone. BirdLife International. 2021. Retrieved 27 January 2021.
  3. ^ 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