| Uni Island | |
| Native Name: | 海栗島 |
| Native Name Link: | japanese language |
| Image Alt: | Uni Island is the northernmost point of Tsushima City, Nagasaki Prefecture, Japan |
| Area Km2: | 0.129766 |
| Coordinates: | 34.7062°N 129.436°W |
| Map: | Japan Nagasaki Prefecture#Japan |
| Label Position: | bottom |
| Archipelago: | Tsushima Islands |
| Location: | Sea of Japan[1] (Tsushima Strait, Korea Strait) |
| Country Admin Divisions Title: | Prefecture |
| Country Admin Divisions: | Nagasaki Prefecture |
| Country Largest City: | Tsushima |
| Demonym: | 対馬 |
| Population: | 60 |
| Density Km2: | 462.37 |
| Ethnic Groups: | Japanese, Koreans |
Uni Island (Japanese: 海栗島) is an island located in Tsushima, Nagasaki Prefecture, Japan, on the border between Japan and South Korea. The entire territory of Uni Island is state-owned land, and the Air Self-Defense Force is stationed on the island (the unit is the 19th Vigilance Team of the Western Air Vigilance Control Regiment under the Western Air Front). Therefore, except for military personnel, access to the island is not permitted.
Although there are no residential buildings on the island, Haikuri Island is not uninhabited as the Ministry of Defense has a government building. In the village of Crocodyura near Tsushima Island, a festival called the Itobatago Festival (Japanese: ひとつばたご祭り), during which villagers are allowed to visit the island to participate in the event,[2] and local ferries are commissioned by the Self-Defense Forces to transport the crew three times a day.
The origin of the island's name comes from the fact that many sea urchins settle around the island, as the name Uni (Japanese: ウニ) means sea urchin in Japanese.
Located at the northernmost tip of Tsushima in Nagasaki Prefecture, Japan, the island is only in a straight line from South Korea. The island has an area of and a coastline of about . Transportation to Kaikuri Island is very inconvenient, and there is no bridge connecting it to the main island of Tsushima.
Uni Island has a humid subtropical climate (Köppen climate classification Cfa. The average annual temperature in Uni Island is . The average annual rainfall is with July as the wettest month. The temperatures are highest on average in August, at around, and lowest in January, at around . The highest temperature ever recorded in Uni Island was on 19 August 2013; the coldest temperature ever recorded was on 16 January 2011.