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The site was identified as internationally important for bird conservation in 2004 because it was regularly supporting significant populations of the species listed below, meeting IBA criteria.

Populations meeting IBA criteria ('key species') at the site:

Species	Red List	Season (year/s of estimate)	Size	IBA criteria
Whooper Swan Cygnus cygnus	LC	winter (2003)	present	A4i

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2004. The most recent assessment (2015) is shown below.

State (condition of the key species' habitats)
Habitat	Quantity (% remaining)	Quality (% carrying capacity)	Result
Wetlands (inland)	good (>90%)	moderate (70–90%)	near favourable

Pressure (threats to the key species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Energy production and mining	happen­ing now	few individ­uals/small area (<10%)	no deteri­oration (<1% over 3 gener­ations)	low

Response (conservation actions taken for the key species and/or their habitats)
Designation	Planning	Action	Result
Little/none of site covered (<10%)	No manage­ment planning has taken place	Very little or no conservation action taking place	very low

Year	Protected Area	Designation (management category)	% coverage of IBA
-	Tamagawa Wildlife Protection Area (Local)	Other (-)	-
1992	Uguisuno	都道府県指定鳥獣保護区 (IV)	67

Habitat	% of IBA	Habitat detail
Wetlands (inland)	-	Rivers and streams

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Recommended citation
BirdLife International (2025) Important Bird Area factsheet: Tama river (Japan). Downloaded from https://datazone.birdlife.org/site/factsheet/tama-river-iba-japan on 25/01/2025.