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Location Japan, Hokkaido
Central coordinates 144o 53.00' East  43o 5.00' North
IBA criteria A1, A4i
Area 20,000 ha
Altitude 0 - 10m
Year of IBA assessment 2004

Wild Bird Society of Japan

Site description The site consists of Lake Akkeshiko, a brackish lake, and a lowland moor with Phragmites australis and Carex where the Bekanbeushigawa river flows into Lake Akkeshiko, a high moor near the center, and a salt marsh on the sea coast. Japanese Cranes breed on the marsh. Lake Akkeshiko is the largest wintering ground in Japan for Whooper Swan, because it does not freeze all over the lake even during cold winters.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Whooper Swan Cygnus cygnus winter  2004  present  A4i  Least Concern 
Steller's Sea-eagle Haliaeetus pelagicus winter  2004  present  A1  Vulnerable 
Red-crowned Crane Grus japonensis breeding  2004  present  A1  Endangered 

IBA Monitoring

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

No known threats no known threats happening now whole area/population (>90%) no or imperceptible deterioration low

Little/none of site covered (<10%)  A management plan exists but it is out of date or not comprehensive  Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity  low 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Akkeshi - Bekanbeushi - Kiritappu National Wildlife Special Protected Area 10,887 protected area contained by site 10,887  
Akkeshi-ko and Bekambeushi-shitsugen Wetlands of International Importance (Ramsar) 4,896 protected area contained by site 4,896  


IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland) Coastal lagoons; Riverine floodplains; Rivers and streams  -

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Lake Akkeshi, Bekanbeushi marsh. Downloaded from on 25/10/2016

To provide new information to update this factsheet or to correct any errors, please email BirdLife