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Location Japan, Hokkaido
Central coordinates 143o 30.00' East  42o 34.00' North
IBA criteria A1, A3, A4i
Area 5,300 ha
Altitude 0 - 10m
Year of IBA assessment 2004

Wild Bird Society of Japan

Site description There are five lakes on the Tokachi coast including Lake Yudonuma (inland sea-lake 349 ha), Lake Chosetsuko (137 ha), Lake Oikamanaitou (175 ha), Lake Horokayantounuma (60 ha), and Lake Kimontonuma is 5 km inland. The surrounding areas are swamplands and these include the southern area. Main vegetation in the center of the area is dominated by Phragmites australis and Calamagrostis langsdorffii community, Gale belgica var. tomentosa and Calex lasiocarpa var. occultaus community, Carex lyngbrei community and Alnus japonica forest. And in the lakes, aquatic plants such as Scirpus tabernaemontani community, Zizania latifolia community, Menyanthes trifoliate community, Persicaria amphibia, Trapa japonica, Utriclaria japonica, Nuphar japonica, Brasenia schreberi grow.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Greater White-fronted Goose Anser albifrons passage  2004  present  A4i  Least Concern 
Red-crowned Crane Grus japonensis breeding  2004  present  A1, A3  Endangered 
Japanese Thrush Turdus cardis breeding  2004  present  A3  Least Concern 

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

Most of site (50-90%) covered (including the most critical parts for important bird species)  Unknown  Unknown  low 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Yudoh Prefectural Wildlife Protection Area 3,855 protected area contained by site 3,855  


IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland) Coastal lagoons; Permanent swamps  -

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

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