Shark City is a reef site located 500 metres offshore from the Izu Peninsula and Hachijojima, Japan. Divers explore depths ranging from 5 to 17 metres, with an average depth of 10 metres. The site features mild currents and visibility between 5 and 15 metres. Access is strictly by boat, requiring coordination with the local dive shop. The water temperature fluctuates seasonally between 17 and 27 degrees Celsius. The reef environment supports a variety of marine life, including various nudibranchs, cephalopods, rays, and sharks. Due to the presence of sharks and potential currents, advanced certification is recommended for those planning a visit to this location.

Grott 1 is a cave dive located off the Izu Peninsula and Hachijojima, Japan. The site features a cave system ranging from 3 to 17 metres in depth, with an average depth of 12 metres. Access is by boat only. Conditions are generally manageable with mild currents, though visibility can vary significantly between 5 and 25 metres. Divers should exercise caution in this overhead environment, as visibility inside the cave can drop, making a torch essential. The site is suitable for beginners, though buoyancy control is required to navigate the structures safely. Shore facilities including air fills, showers, and toilets are available at the local dive operator.

Kreisel is a reef and drop-off site located off the Izu Peninsula. The topography features a drop-off reaching a maximum depth of 11 metres, providing a comfortable environment for beginner divers. Access to the site is by boat. Conditions are variable, with visibility ranging from 3 to 25 metres and water temperatures fluctuating between 17 and 27 degrees Celsius. Divers should be prepared for mild currents. The site is well-suited for macro photography, as the reef structure requires slow, close-up observation to identify small subjects. Always check local conditions prior to departure, as visibility can change significantly.

Orange Forest is a reef site located off the Izu Peninsula, extending from the surface to a maximum depth of 19 metres. The site is accessible exclusively by boat and is suitable for beginners, though divers should be prepared for moderate currents throughout the dive. Conditions, including visibility, can vary significantly between dives, so it is essential to confirm current status with your operator before entry. The site contains dangerous marine life, and divers are advised to maintain a safe distance from all creatures encountered. Due to the presence of moderate currents, beginners should remain close to their guide at all times.

Tomo is a shallow reef and artificial reef site located off the Izu Peninsula and Hachijojima, Japan. Reaching depths of up to 10 metres, the site is suitable for beginner divers. Visibility typically ranges from 10 to 30 metres. Access is strictly by boat to avoid hazardous surf and shore breaks near the coast. While currents at depth are generally mild, stronger currents can develop in the area, requiring divers to stay close to their guide. The site is diveable year-round, with water temperatures fluctuating between 17C and 27C depending on the month.

Soft Coral Garden is a reef site located 1000 metres offshore, requiring boat access. The reef structure ranges from 5 to 19 metres in depth, with an average of 12 metres, making it suitable for beginner divers. Visibility at the site typically spans 10 to 30 metres. While currents are generally mild, divers must remain aware of potential surge and strong currents, particularly when exiting the boat. Water temperatures fluctuate throughout the year, influenced by the Kuroshio Current, ranging from 17°C in March to 27°C in September. Due to changing sea conditions, it is recommended to stay close to a guide and avoid the site during heavy swells.

Todomari no hana is a combined natural and artificial reef site located off the Izu Peninsula. Accessible only by boat, the site features a reef structure that slopes from the shallows to a maximum depth of 28 metres. Divers should monitor their depth gauge closely to avoid drifting deeper than intended. Conditions are generally manageable with mild, variable currents, though visibility can fluctuate significantly. The site is suitable for open-water certified divers who can navigate varying underwater conditions. Always consult with a local dive operator regarding current visibility and site conditions before planning your boat entry.

Oike is a shallow shore-entry reef site on the Izu Peninsula, reaching a maximum depth of 6 metres. This site provides a low-pressure environment suitable for beginner divers to build confidence. The area features mild currents, though visibility can be variable. Divers should confirm facility availability with a local operator before arrival, as on-site amenities are not guaranteed. Water temperatures fluctuate between 17 and 28 degrees Celsius throughout the year, requiring appropriate exposure protection based on the season. Given the shallow nature of the reef, it is a suitable location for those looking to practice buoyancy and observe the reef structure at a relaxed pace.