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.

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.

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.

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.

Izusan is a reef site located off the Izu Peninsula, reaching depths of up to 17 metres. The topography consists of a reef structure that supports a variety of marine life, including frogfish, cocklefish, longnose hawkfish, and nudibranchs. Divers may also encounter bullhead wrasse, snapper, and seasonal migratory fish such as yellowtail. Access to this site is by boat only. Conditions are variable, with currents that can change without warning, and boat traffic is a constant hazard. Due to these factors, it is recommended that beginners dive with a local guide to navigate the site safely and maintain proper buoyancy during ascents.

Fukuura features a combination of natural and artificial reef structures located off the Izu Peninsula. Suitable for beginners, the site offers depths ranging from 1 to 18 metres with an average of 8 metres. Divers can access the water from either the shore or by boat. Conditions are generally mild, though visibility can vary. The site supports night diving and guided tours are available through local dive shops. The habitat provides a range of environments for various reef fish and invertebrates typical of the region. Water temperatures fluctuate between 17 and 26 degrees Celsius throughout the year.

Triangle is a pinnacle and reef system located 500 metres offshore from the Izu Peninsula. The site ranges from 10 to 21 metres in depth, with an average depth of 12 metres. Divers access the site by boat, where moderate to strong currents are common. The topography features a reef structure covered in soft corals. Visibility varies between 5 and 20 metres. Due to the potential for strong currents and depths reaching 21 metres, divers should monitor their gauges and maintain close contact with their guide. Facilities including changing rooms, showers, and a rinse station are available at the operator base.

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.