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.

Jogashima on the Izu Peninsula features a shallow reef and drop-off accessible via shore entry. Suitable for beginners, the site offers depths between 5 and 10 metres with an average of 8 metres. Divers encounter mild currents, though visibility fluctuates between 3 and 10 metres. The habitat supports a variety of reef fish and invertebrates typical of the region. On-site facilities include parking, toilets, showers, changing rooms, a rinse station, and equipment rental. When entering from the shore, monitor the surf and shore break conditions closely, timing your entry between sets to ensure a safe approach.

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.

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.

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.

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.

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.