Beach Bum is a shallow reef site located on the Izu Peninsula, offering a straightforward shore entry suitable for beginner divers. The site features depths ranging from 2 to 6 metres, with an average depth of 4 metres. Divers can expect mild currents and visibility between 8 and 20 metres. Water temperatures fluctuate seasonally from 16C to 26C, influenced by the Kuroshio Current. When entering from the shore, be aware of potential surge and swell. Exercise caution to avoid contact with sharp coral and rocks, and remain vigilant regarding boat traffic in the area. Typical dive times are approximately 40 minutes. Facilities are not guaranteed, so arrive self-sufficient with necessary equipment.

Zushi is a wall and reef site located off the Izu Peninsula and Hachijojima, Japan. The topography reaches a maximum depth of 22 metres and is suitable for beginner divers. The site features a combination of wall and reef structures, with sea squirts attached to the wall surface. Divers should note that boat access is required, and conditions include mild currents. Water temperatures fluctuate between 16C and 25C throughout the year. Due to the presence of boat traffic, divers must remain alert during ascent and descent procedures and should deploy a safety sausage when surfacing near the boat. Visibility is variable, so checking local conditions before diving is recommended.

Kanaya Sunset Beach is a shallow muck diving site located on the Izu Peninsula. Reaching depths of up to 5 metres, the site features a muck substrate that is well-suited for beginners and snorkellers. The area is characterised by mild currents and calm water, though visibility can be variable depending on local conditions. Shore entry provides easy access to the site, which remains accessible throughout the year. Divers and snorkellers should arrive prepared, as facilities are not guaranteed at this location. The shallow, sheltered environment allows for patient observation of the sediment and low-lying structures found across the seabed.

Grampus is a shore-entry reef dive located on the Izu Peninsula, Japan. The site features shallow depths, providing a forgiving environment for beginners to practice buoyancy control and build confidence. Water temperatures fluctuate throughout the year, ranging from 17C in the winter months to 27C in late summer, requiring divers to select appropriate thermal protection. Because currents at the site are variable and local facilities are limited, it is recommended to contact a local dive operator before visiting to obtain an up-to-date conditions report and confirm necessary equipment. The site is accessible year-round, allowing for flexible planning around calmer weather periods.

Nishikawana is a varied dive site on the Izu Peninsula featuring a combination of reef, drop-off, and cavern topography. Depths range from 8 to 25 metres, with an average of 16 metres. The site is defined by strong, shifting currents resulting from the collision of the warm Kuroshio Current and colder water masses. Visibility typically spans 10 to 20 metres. Due to the constant, strong currents and the need for drift diving proficiency, this site is strictly for advanced divers. Access is by boat only, and divers must maintain close proximity to the vessel during entry and exit. Typical dive duration is 50 minutes.

Gyosho is an artificial reef site located off the Izu Peninsula and Hachijojima, Japan. The topography consists of one-metre square concrete blocks piled on the seafloor, creating a structured habitat that reaches depths between 8 and 20 metres. Access to the site is by boat. Conditions are generally stable, lacking the strong currents found at nearby Nishikawana, which makes the area suitable for intermediate divers and those gaining experience. Divers can navigate from the main fish reef towards the C buoy as they become familiar with the underwater layout. Water temperatures fluctuate seasonally, ranging from 17C in the winter months to 26C in September.

Hasama Ocean Park features a combination of natural reef and artificial reef structures, offering a varied underwater environment. With depths ranging from 2 to 17 metres and mild currents, the site is well-suited for beginner divers. The site is accessible by boat, and a dive shop is located on-site to assist with equipment and guidance. Water temperatures fluctuate throughout the year, ranging from 17C in the cooler months to 26C in September. Divers should coordinate boat departure times with the local facility prior to arrival.

Shark City is a boat-accessible dive site located 500 metres from the shore of the Izu Peninsula and Hachijojima. The site features a combination of natural reef and artificial reef structures, offering a drift diving experience. Divers can expect depths ranging from 9 to 25 metres, with an average depth of 20 metres. Conditions vary, with visibility spanning 5 to 30 metres and mild currents. Due to the depth and potential for strong currents, this site is suited for intermediate divers. Facilities available at the site include changing rooms, showers, equipment rental, and guided tours. Boat traffic is a noted hazard, and divers should manage decompression and nitrogen narcosis risks accordingly.