Uminchu is an artificial reef located off Zamami Island, Japan, featuring a structure that descends to a maximum depth of 25 metres. The site is characterised by strong currents that require careful planning and coordination with surface support teams. Visibility at the site typically ranges between 10 and 30 metres. Due to the nature of the currents, this site is suited for intermediate divers. Access is exclusively by boat, and divers should consult with local operators regarding tidal shifts and current direction before entry. Water temperatures fluctuate between 22 and 29 degrees Celsius throughout the year.

Tokashiki Three Rocks is a boat-accessible reef site located off Zamami Island. The topography consists of table and branch corals, with depths ranging from 5 to 17 metres and an average depth of 10 metres. Visibility is high, typically between 30 and 60 metres, and currents are generally mild. The site is suitable for beginners, though divers should exercise caution around sharp coral and rocks. Water temperatures fluctuate between 22 and 29 degrees Celsius throughout the year. Guided tours are available through local dive shops to assist with navigation and site safety.

Aharen Beach on Zamami Island is a reef site suitable for both diving and snorkelling. Located within the Kerama Islands, this shore-entry site features depths ranging from 1 to 6 metres, with an average depth of 3 metres. Divers and snorkellers can explore the reef approximately 50 metres from the shore. Conditions are generally mild, with visibility reaching between 20 and 50 metres. Water temperatures fluctuate between 22C and 29C throughout the year. Visitors should be aware of boat traffic in the area. On-site facilities include parking, toilets, showers, changing rooms, a rinse station, equipment rental, a cafe, and a dive shop.

Ariga Cable is a reef dive site located off Zamami Island in the Kerama Islands. The site features a consistent depth of approximately 7 metres, with an average depth of 20 metres recorded in the area. Access is by boat only. Divers should be prepared for mild currents and visibility ranging from 10 to 25 metres. Water temperatures fluctuate between 22C and 29C throughout the year. Potential hazards at this location include jellyfish, lionfish, rip currents, sea urchins, and stonefish. Due to the conditions and environment, this site is best suited for intermediate divers.

Hanare Beach is a shallow reef site located 1000 metres off Zamami Island, Japan. Accessible only by boat, the site features depths ranging from 2 to 9 metres with an average of 6 metres. Visibility typically spans 10 to 25 metres, and the mild current provides comfortable conditions for beginners. The reef structure requires caution, as sharp coral and rocks are present. Snorkellers should remain vigilant for jellyfish when entering the water. Facilities including showers, changing rooms, and a dive shop are available nearby. Species recorded around this area include wrasses, Moorish idols, anemonefish, and various butterflyfish, though these are not confirmed at this specific site.

Okinawa Islands Reef #1 is a shore-entry reef site located off Zamami Island. Divers can expect visibility ranging from 10 to 30 metres and water temperatures between 22 and 29 degrees Celsius. The site features a shallow reef structure suitable for newly certified divers, though variable currents and surf conditions require careful monitoring during entry. Due to the presence of jellyfish and surf, a full wetsuit with gloves is recommended. Species recorded around this area include green sea turtles, titan triggerfish, regal angelfish, clown triggerfish, turkey moray, lunartail grouper, day octopus, wrasses, Ijima's sea snake, blackback anemonefish, moorish idol, flagtail triggerfish, pink skunk anemonefish, and lined butterflyfish.

Crevasse is a reef site located 2000 metres off Zamami Island in the Kerama Islands. Accessible only by boat, the site features depths ranging from 8 to 16 metres with an average of 12 metres. Divers and snorkellers can expect mild currents and visibility between 10 and 25 metres. The topography consists of a reef structure that requires careful navigation to avoid sharp coral and sea urchins. Protective footwear is recommended, and divers should exercise caution when placing hands or feet on the reef. Typical dives last approximately 45 minutes. As there are no fixed facilities at this location, all boat and equipment arrangements must be confirmed with an operator in advance.

Nakachiburu is a sheltered reef dive located 2000 metres off Zamami Island. Suitable for beginner divers, the site features depths ranging from 5 to 14 metres with an average of 10 metres. Divers can expect mild currents and visibility between 10 and 20 metres. Access is by boat only. The reef structure includes sharp coral and rocks, requiring careful buoyancy control to avoid contact. Water temperatures fluctuate between 22 and 29 degrees Celsius throughout the year. Hazards include jellyfish in the water column, sharp coral, and stonefish resting on the substrate. Divers should exercise caution regarding placement of hands and knees and consult boat operators regarding current jellyfish presence.