Usami Manbo Point is a reef site located off the Izu Peninsula, Japan. The site extends from the surface to a maximum depth of 19 metres, making it suitable for beginner divers. Access is exclusively by boat, and divers should be aware of variable currents throughout the area. Due to the presence of boat traffic, it is essential to use a safety sausage when surfacing and remain close to your guide during ascent. Guided tours, air fills, and equipment rental are available locally to assist with navigation and safety. Conditions can vary, so checking current patterns with a local guide before entry is recommended.

Usami Kagone features a combination of natural reef and artificial structures located 100 metres from the shore. Divers and snorkellers can explore depths ranging from 10 to 18 metres, with an average depth of 15 metres. The site is suitable for beginners, offering manageable conditions with mild currents and visibility between 5 and 15 metres. Boat access is required to reach the site. Facilities including air fills and equipment rental are available nearby, allowing for convenient preparation before departure. Water temperatures fluctuate throughout the year, ranging from 17C in winter to 26C in September, necessitating appropriate thermal protection during cooler months.

Usami Beach on the Izu Peninsula offers a combination of natural and artificial reef structures suitable for beginner divers. The site features depths ranging from 1 to 25 metres, with an average depth of 7 metres. Divers can expect mild currents and visibility between 5 and 15 metres. Shore entry is standard, though divers should remain vigilant for boat traffic near the surface and use a surface marker buoy. Protective footwear is recommended to navigate sharp coral and rocks. Facilities including parking, toilets, and a rinse station are available on site. Night diving is permitted, providing additional opportunities to explore the reef environment.

Sodaine is a boat-access site located 1000 metres offshore, featuring a combination of a pinnacle, reef, and wall. Divers can explore depths ranging from 15 to 26 metres, with an average depth of 14 metres. The site experiences moderate currents and visibility typically between 10 and 25 metres. Marine life includes crocodile fish resting on the substrate, red spotted lobster within wall crevices, and wrasse and snapper in the mid-water. Japanese snow fish and soft gingerbread hem stars are also present on the reef surface. Guided tours and air fills are available for this 30-minute dive, which is suitable for beginners.

Chinese Wreck is a boat-accessed dive site located off the Izu Peninsula. The wreck lies at depths between 25 and 35 metres, with an average depth of 30 metres. Due to the depth and the nature of the wreck, this site is suitable for advanced divers only. Divers should be prepared for moderate currents and surge, with visibility typically ranging from 5 to 10 metres. Hazards at this site include the deep profile, potential for entanglement, nitrogen narcosis, and the risks associated with an overhead environment. Guided tours and boat charters are available to facilitate access to this site.

The Atami Wreck is an artificial reef located 400 metres offshore on the Izu Peninsula. Resting at depths between 18 and 35 metres, this site is suited for intermediate divers. Access is by boat only, and divers should be prepared for variable visibility ranging from 5 to 40 metres. Currents are typically mild, though stronger surges can occur. The wreck structure presents an overhead environment, requiring caution to avoid entanglement. Water temperatures fluctuate between 17C and 25C, with a summer thermocline and potential winter lows of 10C. Divers should remain vigilant for boat traffic when surfacing.

Atami Kosoga Cave is a shallow marine cave located off the Izu Peninsula, Japan. The site is suitable for beginner divers, with depths reaching a maximum of 10 metres. Access is strictly by boat, and divers should remain aware of boat traffic when surfacing. Conditions are generally manageable due to mild currents, though visibility within the cave can be variable. Divers are advised to carry a torch to navigate the cave structure safely. As there are no permanent facilities on-site, check for local availability before planning a trip. Exercise caution to avoid contact with the cave walls and floor while exploring this shallow environment.

Bitagane is a reef dive on the Izu Peninsula that extends from the surface to a depth of 24 metres. This site is strictly for advanced divers due to strong currents and the presence of sharp coral. Visibility typically ranges between 10 and 20 metres. Divers must use boat access, and precise buoyancy control is essential to navigate the reef structure safely. Species recorded around this area include wrasses, pufferfish, scorpionfish, reef squid, and various shrimp and snails. Divers should coordinate with boat operators to time descents with slack or early flood currents to manage the challenging water movement effectively.