The park protects four distinct species of mangrove trees: Kandelia obovata, Bruguiera gymnorhiza, Rhizophora stylosa, and Lumnitzera racemosa.
The Gesashi River estuary is the only location in Okinawa where four mangrove species coexist in a single habitat.
The boardwalk is elevated to minimize human footprint on the delicate root systems that oxygenate the muddy riverbed.
During low tide, the expansive mudflats become visible, revealing extensive burrowing activity from local crab populations.
Higashi-son Fureai Hirugi Park is home to the Gesashi River mangrove forest, the largest in Okinawa Island. The park features a wooden boardwalk that allows visitors to traverse the brackish water ecosystem without disturbing the sediment. It serves as a protected habitat for diverse wildlife including fiddler crabs, mudskippers, and various bird species. Visitors can access the waterfront via a small landing area suitable for launching canoes or kayaks. The site is a central hub for eco-tourism in the Yanbaru region, which is recognized as a UNESCO World Natural Heritage site. Information boards along the path detail the ecological functions of the mangrove species present, such as Kandelia obovata.
The mid-point of the elevated boardwalk provides a clear, unobstructed panoramic view of the river winding through the dense mangrove canopy.
Bring high-quality insect repellent, as the humid mangrove environment attracts mosquitoes.
Check local tide charts; the scenery and wildlife activity change significantly between high and low tide.
Wear closed-toe, comfortable walking shoes rather than sandals to protect against uneven boardwalk surfaces.
Attempting to walk off the path into the mud, which can be dangerously soft and traps feet easily.
The park remains open year-round, though boardwalk access may be restricted during severe weather conditions or typhoons.
Stay on the designated boardwalk to protect the mangrove root systems; do not collect shells or disturb wildlife.
