The underwater observatory tower was constructed in 1970, making it one of the oldest such facilities in Japan.
The facility is situated within a designated marine sanctuary zone, which restricts commercial fishing and preserves the natural habitat.
The glass-bottom boat features a wide-angle viewing deck designed specifically to reduce glare from the water surface.
The observatory's 24 windows provide a 360-degree panoramic view of the reef floor, which sits approximately 4 to 5 meters below the low-tide surface.
The site frequently hosts wild sea turtles, which are attracted to the nutrient-rich currents circulating around the observatory pilings.
Busena Marine Park is Okinawa's only underwater observatory located directly within a coral reef lagoon. The park features a spiral-staircase underwater observatory tower situated 170 meters offshore, connected by a wooden pier. Visitors view marine life through 24 circular glass windows positioned at varying depths below sea level. The facility also operates a whale-shaped glass-bottom boat that cruises over the reef, providing views of tropical fish and coral formations. The observation area is located within the protected waters of the Busena Resort area, maintaining a high density of wild marine biodiversity. The reef is home to diverse species including clownfish, sea turtles, and various types of branching coral. No artificial tanks are used; all viewing is of the natural ocean ecosystem. The site is accessible to visitors regardless of their ability to swim or snorkel.
The end of the pier looking back toward the shoreline during golden hour.
Check the official website for daily 'visibility' reports, which fluctuate significantly based on tide levels and recent weather conditions.
Plan your visit for low tide, as the water clarity and visibility through the glass-bottom boat and observatory windows are highest during this period.
Bring a polarizing filter for your camera to mitigate heavy reflection when photographing through the thick glass panels.
Do not visit during or immediately after heavy storms, as high wind and wave activity can result in low-visibility or temporary closure of the boat tours.
Operations may be suspended on short notice due to high waves, typhoons, or strong wind currents.
Avoid touching the coral or marine life if you choose to enter the water near the beach; refrain from tapping on the observatory windows to avoid startling the fish.
