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.

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.

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.

S Point is a reef dive located off the Izu Peninsula and Hachijojima, Japan, accessible exclusively by boat. The site features a reef structure extending from the surface to a maximum depth of 19 metres. Divers can expect mild currents and visibility ranging between 10 and 25 metres. Water temperatures fluctuate significantly throughout the year, from 17 degrees Celsius in March to 27 degrees Celsius in September. Due to the lack of permanent facilities at the site, divers should confirm boat operator schedules and local availability before planning a trip. This site is suited for intermediate divers who are comfortable with boat entries and variable seasonal conditions.

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.

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.

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.

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.