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Location Japan, Tokyo
Central coordinates 139o 48.00' East  33o 6.00' North
IBA criteria A1, A2, A4ii
Area 6,948 ha
Altitude 0 - 700m
Year of IBA assessment 2004

Wild Bird Society of Japan

Site description It is located about 290 km south of Tokyo metropolitan area. The island has two volcanos, Mt Miharayama (701 m) on the southeast and Mt Hachijofuji (854 m) on the northwest. Besides, there is an uninhabited islet called Hachijokojima about 7.5 km northwest of Hachijojima. There are evergreen broadleaf forests on the side of Mt Miharayama, which has a long history as a volcano, while there is a wetland on the volcanic hill at the center of Mt Hachijofuji. Hachijokojima island still has evergreen broadleaf forests where Izu Islands Thrushes, Ijima's Leaf Warblers and Japanese Wood Pigeons live, but its vegetation has been being destroyed by feral goats in recent years.

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 low not assessed low

Agriculture and aquaculture wood and pulp plantations (includes afforestation) - small-holder plantations likely in long term (beyond 4 years) some of area/population (10-49%) no or imperceptible deterioration low

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90%) covered by appropriate conservation designation  A management plan exists but it is out of date or not comprehensive  Unknown  low 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 6,948  


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: Hachijojima island. Downloaded from on 24/10/2016

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