Ramsar site no. A brackish tidal flat located within the Naha City area in the southern part of the main island of Okinawa. Main habitat types are mangroves and associated tidal flats. Ramsar site no. 996. Four lakes of varying salinity surrounded by dunes.
Aquatic vegetation covers the lakes, and pine forests occur in the surroundings.
There is a wildlife observatory at the site. Human activities include small-scale fishing and cultivation. Groundwater levels are declining due to extraction for agricultural purposes. Ramsar site no. 820. A freshwater lake in the Bibi River floodplain, surrounded by reed-sedge swamp, swamp forest and stands of wild rice.