Rainbow Arch is a reef and cave site located 500 metres offshore in the Izu Peninsula and Hachijojima region of Japan. The site features a reef structure and cave system ranging from 5 to 15 metres in depth, with an average of 10 metres. It is accessible only by boat. Visibility typically ranges between 8 and 18 metres, and currents are generally mild. The site is suitable for beginners, though divers should maintain good buoyancy control to avoid contact with the soft corals found on the reef and cave walls. Water temperatures fluctuate throughout the year, ranging from 17C in March to 27C in September.

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.

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.

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.

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.

Pineapple Rock is a reef site located 500 metres offshore, accessible only by boat. The site features depths ranging from 5 to 18 metres, with an average depth of 10 metres. Divers encounter mild currents and visibility typically between 10 and 25 metres. The reef structure consists of sharp coral and rock, requiring careful placement of hands and fins to avoid injury. Due to active boat traffic in the area, divers must remain close to the descent line during surfacing and use a surface marker buoy. Water temperatures fluctuate significantly throughout the year, ranging from 17 to 27 degrees Celsius, necessitating appropriate exposure protection for the season.

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.