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Location Japan, Tokyo
Central coordinates 139o 32.00' East  34o 4.00' North
IBA criteria A1, A2, A4ii
Area 5,550 ha
Altitude 0 - 814m
Year of IBA assessment 2004

Wild Bird Society of Japan

Site description Miyakejima, which is located about 180 km south-southwest of Tokyo metropolitan area, is a volcanic island with the circumference of nearly 35 km and with an area of 55.5 km2. This island has experienced repeated volcanic eruptions, and some distinctive volcanic features like Tairo-ike pond and the former Shinmyo-ike pond can be seen everywhere on the island. From the shore to the area around 450 m above the sea level, we can see evergreen broadleaf forests which mainly consist of Castanopsis cuspdata , Machilus tunbergii and Camellia japonica, etc., as well as secondary forests which consist of some kinds of Alnus japonica and Prunus speciosa, etc.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Japanese Murrelet Synthliboramphus wumizusume breeding  2004  present  A1, A4ii  Vulnerable 
Japanese Woodpigeon Columba janthina resident  2004  present  A2  Near Threatened 
Pleske's Grasshopper-warbler Locustella pleskei breeding  2004  present  A1  Vulnerable 
Izu Leaf-warbler Phylloscopus ijimae breeding  2004  present  A1, A2  Vulnerable 
Izu Thrush Turdus celaenops resident  2004  present  A1, A2  Vulnerable 

IBA Monitoring

2010 medium not assessed low
Poor - based on little, or potentially unreliable/unrepresentative, data

Geological events volcanic eruptions likely in long term (beyond 4 years) some of area/population (10-49%) slow but significant deterioration medium

Whole area of site (>90%) covered by appropriate conservation designation  A management plan exists but it is out of date or not comprehensive  Unknown  low 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Fuji-Hakone-Izu National Park 122,690 protected area contains site 5,550  


IUCN habitat Habitat detail Extent (% of site)
Forest   -
Coastline Rock stacks and islands  -

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Miyakejima island. Downloaded from on 28/10/2016

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