Amiyoko is a muck diving site located off the Izu Peninsula in Japan, accessible only by boat. The topography consists of a sandy and silty bottom that extends from the shallows to a maximum depth of 23 metres. Divers can expect mild currents throughout the site. Because visibility can be variable, it is recommended to check local conditions before departure. This site is suitable for beginners and newly qualified divers. The habitat supports a variety of general reef fish and invertebrates typical of the region. Divers should maintain a slow, patient pace to scan the sediment for small creatures and camouflaged life.

Hebi no kuchi is a shallow reef site located off the Izu Peninsula in Japan. Reaching a maximum depth of 15 metres, the site features mild currents, making it a suitable location for beginner divers. The reef structure is characterised by blue corals and various crevices that provide habitat for small marine life, including wrasses, yellowfin wrasse, green reef fish, and black rockfish. Divers may also observe shrimps, crabs, clown shrimp, anemones, and mussels within the reef. Access to this site is by boat only. Water temperatures fluctuate between 17 and 27 degrees Celsius throughout the year, so divers should verify current conditions and appropriate thermal protection with their boat operator before departure.

MTK Beach is a shore-entry reef site in Japan suitable for beginners and snorkellers. The topography features a reef reaching a maximum depth of 13 metres, characterised by mild currents. Visibility at this location is variable, so checking local conditions prior to entry is recommended. The site supports a variety of reef fish and invertebrates typical of the region. As facilities are not confirmed, divers and snorkellers should arrive prepared with all necessary equipment, including weights and a surface marker buoy. Water temperatures fluctuate between 17C and 27C throughout the year, requiring appropriate exposure protection for comfort.

Owase features a combination of natural reef and artificial reef structures, providing a varied underwater landscape for divers. The site is suitable for beginners, with depths ranging from 8 to 23 metres and an average depth of 10 metres. Conditions include mild currents and visibility between 5 and 20 metres. Access is available via both shore and boat entries. The area is influenced by the warm Kuroshio Current, maintaining water temperatures between 17C and 26C. Facilities at the site include parking, toilets, showers, and changing rooms. Divers should remain cautious of boat traffic when surfaced and wear protective gear to avoid injury from sharp coral and rocks during entry and exit.

Hozaura Nakahirase is a reef site located off the Izu Peninsula, accessible only by boat. The site features a reef structure with depths ranging from the surface down to 19 metres. Divers and snorkellers can expect mild currents throughout the area. Water temperatures fluctuate seasonally, ranging from 17C in March to 27C in September. Visibility at this location is variable, and it is recommended to consult with a boat operator for current conditions before departure. As there are no confirmed facilities at the site, divers should ensure all necessary equipment and hydration are prepared prior to boarding.

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.

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.

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.