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Location Japan, Chiba,Tokyo
Central coordinates 139o 53.00' East  35o 36.00' North
IBA criteria A4i, A4iii
Area 16,000 ha
Altitude 0 - 5m
Year of IBA assessment 2004

Wild Bird Society of Japan



Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Greater Scaup Aythya marila 2004  present [units unknown]  A4i  Least Concern 
Great Cormorant Phalacrocorax carbo breeding  2004  present [units unknown]  A4i  Least Concern 
Grey Plover Pluvialis squatarola 2004  present [units unknown]  A4i  Least Concern 
Whimbrel Numenius phaeopus 2004  present [units unknown]  A4i  Least Concern 
Grey-tailed Tattler Heteroscelus brevipes 2004  present [units unknown]  A4i  Least Concern 
Ruddy Turnstone Arenaria interpres 2004  present [units unknown]  A4i  Least Concern 
Sanderling Calidris alba 2004  present [units unknown]  A4i  Least Concern 
Dunlin Calidris alpina 2004  present [units unknown]  A4i  Least Concern 
A4iii Species group - waterbirds unknown  2004  20,000 individuals  unknown  A4iii   

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Yatsu-higata Wetlands of International Importance (Ramsar) 40 protected area contained by site 40  

Habitats

IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland) Estuarine waters  -

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Inner Tokyo bay. Downloaded from http://www.birdlife.org on 21/04/2014

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