Shishihama on the Izu Peninsula offers diverse shore diving across reef, artificial reef, and muck terrain. Divers can explore depths ranging from 5 to 30 metres, with an average depth of 20 metres. Visibility typically spans 10 to 20 metres, and mild currents make the site suitable for beginners. The entry requires caution due to potential surf and shore break. Facilities available on-site include parking, showers, changing rooms, and air fills. The site is open for night diving, which allows for extended exploration of the varied underwater habitats. Water temperatures fluctuate between 17 and 24 degrees Celsius throughout the year.

Osezaki is a shore dive located on the Izu Peninsula, offering a mix of muck and reef topography. Divers can explore depths ranging from 7 to 40 metres, with an average depth of 12 metres. The site is situated 30 metres from the shore and is known for being relatively calm and sheltered from weather conditions. Visibility typically fluctuates between 5 and 20 metres, and currents are generally mild. The site is suitable for beginners and supports night diving. Facilities available on-site include parking, toilets, showers, changing rooms, air fills, equipment rental, a cafe, first aid, and boat charters.

Ida Beach on the Izu Peninsula is a shore-entry site featuring a gentle underwater slope. This topography makes it a suitable location for beginners to snorkel. The site is known for its clear water conditions, with visibility often exceeding 20 metres. Water temperatures at this location fluctuate throughout the year, ranging from 16C in the late winter months to 28C in August. Species recorded around this area include guitarfish, Indian lionfish, pufferfish, blacktip grouper, various wrasses, Clark's anemonefish, and several types of nudibranchs and sea slugs.

Ita is a shore-entry site on the Izu Peninsula featuring a combination of reef and drop-off topography. The site ranges from 10 to 35 metres in depth, with an average depth of 10 metres. Divers and snorkellers should be prepared for strong currents, which are a defining condition of this location. Visibility typically spans 10 to 30 metres. On-site facilities include parking, showers, and changing rooms, providing convenience for divers after a dive. Due to the demanding nature of the currents, this site is best suited for intermediate-level divers. Typical dives last approximately 40 minutes, and it is recommended to time entries around slack water.

Toi Beach on the Izu Peninsula offers a diverse underwater environment featuring a natural reef, a wreck, and an artificial reef structure. Suitable for beginners, the site ranges from 2 to 15 metres in depth with an average of 10 metres. Shore entry leads to mild currents and visibility typically between 10 and 30 metres. The site is well-equipped with parking, toilets, showers, changing rooms, and rinse stations. Night diving is permitted, providing opportunities to observe the reef after dark. Divers should remain aware of the presence of jellyfish and sharks in the area throughout their dive.

Atami Kosoga Cave is a shallow marine cave located off the Izu Peninsula, Japan. The site is suitable for beginner divers, with depths reaching a maximum of 10 metres. Access is strictly by boat, and divers should remain aware of boat traffic when surfacing. Conditions are generally manageable due to mild currents, though visibility within the cave can be variable. Divers are advised to carry a torch to navigate the cave structure safely. As there are no permanent facilities on-site, check for local availability before planning a trip. Exercise caution to avoid contact with the cave walls and floor while exploring this shallow environment.

Usami Beach on the Izu Peninsula offers a combination of natural and artificial reef structures suitable for beginner divers. The site features depths ranging from 1 to 25 metres, with an average depth of 7 metres. Divers can expect mild currents and visibility between 5 and 15 metres. Shore entry is standard, though divers should remain vigilant for boat traffic near the surface and use a surface marker buoy. Protective footwear is recommended to navigate sharp coral and rocks. Facilities including parking, toilets, and a rinse station are available on site. Night diving is permitted, providing additional opportunities to explore the reef environment.

Usami Manbo Point is a reef site located off the Izu Peninsula, Japan. The site extends from the surface to a maximum depth of 19 metres, making it suitable for beginner divers. Access is exclusively by boat, and divers should be aware of variable currents throughout the area. Due to the presence of boat traffic, it is essential to use a safety sausage when surfacing and remain close to your guide during ascent. Guided tours, air fills, and equipment rental are available locally to assist with navigation and safety. Conditions can vary, so checking current patterns with a local guide before entry is recommended.