This Marine IBA is identified using seaward extensions around breeding colonies. It originates from the Japan Exclusive Economic Zone (EEZ) and falls within the Pacific, Northwest FAO ocean region. The site covers an area of 4 km2 and borders the coastline. The depth ranges from 0 to 7 m.
2 species trigger IBA criteria at this Marine IBA. Seaward extensions around breeding colony; Iwo islands include key near-colony areas for breeding populations of Matsudaira's Storm-petrel (DD) and Red-tailed Tropicbird (LC).
BirdLife International (2020) Important Bird Areas factsheet: Kazan-Retto Islands - Marine. Downloaded from http://www.birdlife.org on 16/07/2020.