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| Tori-shima | |
|---|---|
| Name | Tori-shima |
| Native name | 鳥島 |
| Location | Pacific Ocean |
| Coordinates | 33°14′N 139°46′E |
| Archipelago | Izu Islands |
| Area km2 | 2.5 |
| Highest point m | 394 |
| Country | Japan |
| Prefecture | Tokyo Metropolis |
Tori-shima Tori-shima is a small volcanic island in the Izu Islands chain administered by Tokyo Metropolis. The uninhabited island is notable for its steep cliffs, persistent volcanic activity, and as a critical breeding site for seabirds including the short-tailed albatross, black-footed albatross, and various species of shearwater. Tori-shima's isolation and protected status have made it a focal point for naturalists, volcanologists, and conservation organizations such as the Japan Agency for Marine-Earth Science and Technology and the Ministry of the Environment (Japan).
The island lies in the Pacific Ocean approximately 600 km south of Tokyo and southwest of Honshu. Tori-shima's topography is dominated by a central stratovolcanic cone rising steeply from submarine slopes, forming cliffs and narrow coastal platforms similar to other Izu–Bonin–Mariana Arc islands such as Ogasawara Islands and Mikura-shima. Nearby maritime features include the Kuroshio Current influence and seabed structures mapped by agencies like Japan Coast Guard and Geospatial Information Authority of Japan. The climate is maritime, influenced by the North Pacific Gyre and seasonal shifts associated with the East Asian monsoon and occasional typhoons tracked by the Japan Meteorological Agency.
Tori-shima is part of the Izu–Bonin–Mariana Arc produced by subduction of the Pacific Plate beneath the Philippine Sea Plate. Its geology displays andesitic to dacitic compositions common to island arc stratovolcanoes studied by the Earthquake Research Institute, University of Tokyo and researchers from the National Institute of Advanced Industrial Science and Technology. Historic eruptions have been documented by the Japan Meteorological Agency and seismic monitoring networks like the Japan Meteorological Business Support Center. Notable eruptive events in the 19th and 20th centuries altered the island's surface morphology, prompting field campaigns by teams from University of Tokyo and international collaborators including scientists from Smithsonian Institution and Scripps Institution of Oceanography.
Tori-shima supports globally significant seabird colonies, most famously the short-tailed albatross whose population was reduced by 20th-century hunting and feather trade linked historically to markets like those in Meiji period Japan and later protected under laws influenced by international conventions such as agreements comparable to the Convention on Migratory Species. Other breeders include black-footed albatross, various shearwater species, and colonial nesting seabirds studied by ornithologists from institutions like the Wild Bird Society of Japan, BirdLife International, and university departments at Hokkaido University and Kyoto University. Vegetation is sparse but includes coastal herbs and grasses with biotic surveys conducted by teams from the National Museum of Nature and Science and conservation NGOs such as the World Wide Fund for Nature. The island also hosts invertebrate assemblages and marine fauna monitored by the Japan Fisheries Research and Education Agency and researchers from Tohoku University.
Human interaction with the island has been episodic. Historical records from Edo period maritime logs, charts by the Tokugawa shogunate, and later surveys by the Meiji government note visits for guano extraction, seabird hunting, and occasional shipwrecks involving vessels associated with ports like Yokohama and Shimoda. Government-led evacuation and resettlement policies by Tokyo Metropolis followed hazardous eruptions that rendered permanent habitation untenable. Scientific expeditions from institutions such as the Imperial University and postwar teams from the Japan Self-Defense Forces and civilian agencies documented ruins of temporary shelters and artifacts collected by curators at the Tokyo National Museum and regional archives.
Tori-shima is designated as a protected area under frameworks administered by the Ministry of the Environment (Japan) and benefits from species protection measures influenced by international bodies like International Union for Conservation of Nature and bilateral agreements with research partners including United States Fish and Wildlife Service for migratory bird conservation. Management actions encompass invasive species control, habitat restoration projects led by universities and conservation NGOs, and long-term monitoring by the BirdLife International partner organizations and national research institutes. Biosecurity protocols and access restrictions are enforced by Tokyo Metropolitan Government in coordination with the Japan Coast Guard to safeguard fragile ecosystems and minimize disturbance to breeding seabirds.
Access to the island is highly restricted; landings require permits from Tokyo Metropolis and coordination with agencies such as the Japan Coast Guard and the Ministry of the Environment (Japan). Scientific expeditions are typically staged from ports like Tokyo and Shimoda using charter vessels or research ships operated by agencies including the Japan Agency for Marine-Earth Science and Technology. There is no regular tourist service; interested visitors are generally directed to neighboring Izu Islands such as Oshima and Miyakejima where regulated ecotourism and visitor facilities exist, with outreach and education supported by museums like the National Museum of Nature and Science and conservation groups like the Wild Bird Society of Japan.
Category:Islands of Tokyo Category:Volcanoes of Japan Category:Uninhabited islands of Japan