Manko from Haryu Bridge
Manko from Toyomi Bridge


  • Country: 
  • Site number: 
  • Area: 
    58 ha
  • Designation date: 
  • Coordinates: 
    26°11'N 127°41'E
Materials presented on this website, particularly maps and territorial information, are as-is and as-available based on available data and do not imply the expression of any opinion whatsoever on the part of the Secretariat of the Ramsar Convention concerning the legal status of any country, territory, city or area, or of its authorities, or concerning the delimitation of its frontiers or boundaries.


The Site is an estuary tidal flat formed at the meeting point of the Kokuba River flowing through Naha City and the Noha River flowing through Tomigusuku City, in the southern part of Okinawa Island. It is located three kilometres inland and is affected by tidal fluctuations, with a maximum of 47 hectares of mudflat appearing at low tide. The Site is an important stop-over place for migratory waterbirds because there are abundant juvenile fish and benthos such as lugworms, which are specific to brackish tidal flat. Many shorebirds are observed and these include Pacific golden plover (Pluvialis fulva), dunlin (Calidris alpina), Eurasian curlew (Numenius arquata), far eastern curlew (Numenius madagascariensis), black-faced spoonbill (Platalea minor) and Saunders’s gull (Larus saundersi).

Administrative region: 
Naha City and Tomigusuku City, Okinawa Prefectue

  • National legal designation: 
    • Special Protection Area of National Wildlife Protection Area - Manko Special Protection Area within Manko National Wildlife Protection Area
  • Last publication date: 


Ramsar Information Sheet (RIS)