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Location Japan, Niigata
Central coordinates 139o 15.00' East  37o 54.00' North
IBA criteria A4i
Area 163 ha
Altitude 0 - 5m
Year of IBA assessment 2004

Wild Bird Society of Japan

Site description Thirteen medium and small-sized rivers flow into Fukushimagata in Niigata Prefecture. Fukushimagata functions as flood control, and its water flows to the Japan Sea through artificial watercourses. There are vast reed beds around Fukushimagata, and paddy fields are found as far as you can see the area. It is the northern limit of the Euryale ferox habitat. About 450 kinds of plants including aquatic plants and hydorphytes such as Monochoria korsakowii and Sparganium erectum . are observed.

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 
Tundra Swan Cygnus columbianus winter  2004  present  A4i  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

Whole area of site (>90%) covered by appropriate conservation designation  Unknown  Unknown  low 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Fukushimagata National Wildlife Special Protected Area 163 is identical to site 163  


IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland) Freshwater lakes and pools; Permanent swamps  -

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Lake Fukushimagata. Downloaded from on 27/10/2016

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