Data Zone
Country/territory: Japan
IBA Criteria met: -
For more information about IBA criteria please click here
Area: 5,125,351 ha
Site description
This Marine IBA is identified using both tracking data and seaward extensions around breeding colonies. It falls within the Japan Exclusive Economic Zone (EEZ) and the Pacific, Northwest FAO ocean region. The site covers an area of 51254 km2 and borders the coastline. The depth ranges from 0 to 8138 m, with a mean annual wind speed of 2.03 m/s and mean annual sea surface temperature falls between 12.95 and 22.25 °C.
Key biodiversity
4 species trigger IBA criteria at this Marine IBA. BirdLife analyses of tracking data estimates that 698276-1241379 individuals of Streaked Shearwater (LC) from Japan are present at the site during the Non-breeding (Oct-Dec) life-history stage. 3750000-4166667 individuals of Sooty Shearwater (NT) from New Zealand are present at the site during the Non-breeding (May-Jul) life-history stage. Seaward extensions around breeding colony; Sanganjima islet include key near-colony areas for breeding populations of Streaked Shearwater (LC) and Black-tailed Gull (LC) 20000-40000 individuals.
Recommended citation
BirdLife International (2023) Important Bird Areas factsheet: Futagojima islets / Sanganjima islet - Marine. Downloaded from
http://www.birdlife.org on 01/04/2023.
