Kujuppama Beach on the Izu Peninsula is a small cove featuring a white sand bottom and rocky outcrops. Snorkelling is best concentrated around the rocky formations located at the northern end of the beach. The site is suitable for beginners and offers shore access. Water temperatures fluctuate between 18C and 28C depending on the month. Facilities available at the site include parking, toilets, showers, changing rooms, and a rinse station. Equipment rental is also provided for visitors. Divers and snorkellers should remain aware of the presence of jellyfish in the area, and currents are generally mild.

Inatori Port is a shallow shore entry site on the Izu Peninsula, reaching a maximum depth of 9 metres. This site is suitable for beginners and those looking to build confidence in the water. The reef environment experiences mild currents, allowing for slow, patient observation of the local habitat. Divers and snorkellers can expect to encounter a variety of reef fish and invertebrates typical of the region. Visibility at this site is variable and can be significantly reduced by recent rain or swell. As there are no confirmed facilities on site, visitors should arrive prepared with all necessary equipment, water, and supplies.

Ebisu Island is a small island connected to the Susaki Peninsula by a bridge, offering accessible shore-entry snorkelling. The site features shallow tide pools and channels, making it suitable for beginners. Depths range from 1 to 8 metres with an average of 4 metres. Conditions are generally mild with visibility varying between 5 and 15 metres. Water temperatures fluctuate throughout the year, ranging from 18C in the winter months to 28C in late summer. Parking is available for visitors. The site is well-regarded for snorkelling, with typical sessions lasting up to 120 minutes.

Hokkawa Kajikaki is a marine site off the Izu Peninsula featuring a combination of natural reef and artificial reef structures. The site is suitable for beginner divers, with depths ranging from 12 to 24 metres and an average depth of 15 metres. Divers encounter mild currents throughout the area. Access to this site is by boat only. The habitat supports a variety of reef fish and invertebrates typical of the region. Water temperatures fluctuate between 17 and 25 degrees Celsius, requiring divers to select appropriate thermal protection based on the time of year.

Mitsune is a challenging drift dive located off the Izu Peninsula, characterised by strong currents and depths typically between 19 and 22 metres. Due to hazardous shore breaks, boat access is mandatory for all dives. Visibility at the site ranges from 15 to 30 metres, providing clear sightlines across the underwater topography. Water temperatures fluctuate between 18C and 27C, influenced by the Kuroshio Current, with wetsuits recommended outside of summer. This site is strictly for advanced divers who possess strong buoyancy control and current-reading skills. A surface marker buoy is essential equipment for all divers here. Equipment rental is available locally.

Mikomoto Island is a small, uninhabited island located 10 kilometres off the southeast coast of the Izu Peninsula. This drift and reef site is defined by its challenging environment, featuring strong currents and shoals that have historically served as a significant navigational point. Divers typically experience depths between 20 and 35 metres, with an average of 25 metres. Due to the fierce currents and depth, this site is strictly for advanced divers. Access is exclusively by boat. Visibility ranges from 14 to 30 metres, and water temperatures fluctuate between 14 and 25 degrees Celsius depending on the season. The island is marked by the Mikomotojima Lighthouse, the oldest stone lighthouse in Japan.

Budaine is a drift dive located off the Izu Peninsula, Japan, characterised by strong currents that require advanced diving skills. The site reaches depths of 24 metres and is strictly a boat-access location. Divers should be prepared for shifting conditions and must maintain confident buoyancy control throughout the dive. Due to the nature of the current, it is essential to carry a surface marker buoy and deploy it early during ascent to ensure visibility to the boat crew. The site supports a variety of marine life typical of the region's habitat, including various reef fish and invertebrates.

Kadone is a wall and drift dive site located off the Izu Peninsula, Japan. Reached exclusively by boat, the site features a vertical wall structure that descends to a maximum depth of 22 metres. Divers must be prepared for strong currents that persist throughout the dive, requiring advanced buoyancy control and constant situational awareness. Due to the demanding nature of the flow, which can make entry and exit challenging, it is essential to coordinate with local boat operators regarding tide stages. Water temperatures fluctuate between 18C and 27C throughout the year, necessitating appropriate exposure protection for the season. Divers should remain close to their team and monitor their position relative to the boat at all times.