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Location Japan, Miyagi
Central coordinates 141o 7.00' East  38o 43.00' North
IBA criteria A4i, A4iii
Area 1,800 ha
Altitude 0 - 40m
Year of IBA assessment 2004

Wild Bird Society of Japan

Site description The site is formed on the borderlines of plains and hilly districts in the northern part of Miyagi Prefecture. Lake Izunuma and Lake Uchinuma area used to be a vast wetland spreading along the Hasamagawa river, but repeated reclamation works have shaped the present form of lakes. Underwater and floating leaved plants thrive in the shallow waters, while emergent plant zone with Phragmites australis and others expands along the lakes. Salix forests are formed outside the emergent plant zone, along banks and inflowing rivers. In some parts of its extensive open water surface, muddy bottoms of the lakes are exposed like tidal wetlands in the drought season. Most of the flat lands around the lakes are rice paddy fields, and low hills around the lakes are utilized as afforestation areas for Cyryptomeria japonica, Quercus serrata and Castanea crenata secondary forests, fields, residential areas and for other versatile purposes.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Northern Pintail Anas acuta winter  2004  present  A4i  Least Concern 
Greater White-fronted Goose Anser albifrons winter  2004  present  A4i  Least Concern 
Whooper Swan Cygnus cygnus winter  2004  present  A4i  Least Concern 
A4iii Species group - waterbirds winter  2004  min 20,000 individuals  A4iii   

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(50-90%) covered (including the most critical parts for important bird species)  A management plan exists but it is out of date or not comprehensive  Unknown  low 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)  
Izu-numa and Uchi-numa Wetlands of International Importance (Ramsar) 559 protected area contained by site 559  
Izunuma National Wildlife Special Protected Area 1,450 unknown 0  


IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland) Freshwater lakes and pools  -
Artificial - terrestrial Rice paddies  -

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Izunuma and nearby lakes. Downloaded from on 22/10/2016

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