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Location Japan, Hokkaido
Central coordinates 143o 33.00' East  42o 47.00' North
IBA criteria A1, A3, A4i
Area 10,000 ha
Altitude 0 - 5m
Year of IBA assessment 2004

Wild Bird Society of Japan

Site description The lower Tokachigawa river, 40 km from its estuary, consists of the Tokachigawa river, farmlands and a cutoff lake. The Tokachigawa river was straightened by 1945, and this also created farmlands and a lake. For 30 km from the estuary where the Ribetsugawa river flows in, the Tokachigawa river runs slowly without shallow bottoms, and the upper part of the river is rapids. On the dry riverbed areas within banks are grasslands and pastures with trees such as Salix, and herbs such as Artemisia montana, Phalaris arundinacea. Japanese Cranes and Red-necked Grebes nest in the wetland areas near the lake. During spring and autumn migration seasons, about 5,000 geese (White-fronted Goose, and Bean) stop over, and the White-tailed Eagle and the Steller's Sea Eagles winter here.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Bean Goose Anser fabalis winter  2004  present  A4i  Least Concern 
Red-crowned Crane Grus japonensis breeding  2004  present  A1, A3  Endangered 
Eastern Crowned Warbler Phylloscopus coronatus breeding  2004  present  A3  Least Concern 

IBA Monitoring

2010 low not assessed negligible
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%)  Unknown  Unknown  negligible 


IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland) Permanent swamps; Rivers and streams  -

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Lower Tokachi river. Downloaded from on 25/10/2016

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