Otomi Beach is a shore-entry reef site in Japan suitable for beginners. The site features depths ranging from 1 to 10 metres with mild currents. Visibility varies significantly, fluctuating between 3 and 30 metres depending on conditions. The water temperature ranges from 12C in winter to 27C in late summer. The habitat supports a variety of reef fish and invertebrates typical of the region. Divers should be aware of potential hazards including jellyfish and stonefish. Facilities are available at the local dive shop.

Kanmurishima Island features a combination of wall and reef topography that descends to a maximum depth of 24 metres. This site is accessible only by boat and is suited for intermediate divers due to the presence of variable and potentially strong currents. Divers should monitor their depth closely as the wall drops quickly. Water temperatures fluctuate significantly throughout the year, ranging from 12 to 26 degrees Celsius, necessitating appropriate thermal protection depending on the season. Given the nature of the currents and depth, strong buoyancy control is required for a safe experience at this location.

Chishima is a wall and reef system in Japan that descends from 5 to 40 metres. This site is suited for intermediate divers, offering visibility between 15 and 21 metres. The topography features a distinct drop-off that requires boat access to avoid dangerous surf and shore break. Divers should monitor moderate currents, which can influence drift along the wall. Water temperatures fluctuate between 12 and 23 degrees Celsius throughout the year, necessitating appropriate exposure protection. Typical dives last approximately 40 minutes. Due to the significant depth and current conditions, coordinate all entry and exit logistics with a boat skipper.

Komatsu is a reef and kelp forest site located off the Izu Peninsula in Japan. Reaching depths of up to 17 metres, the site provides a suitable environment for beginner divers. The underwater topography features a mix of reef structures and kelp growth, which support a variety of temperate marine life and invertebrates. Water temperatures fluctuate significantly throughout the year, ranging from 12°C to 27°C, and a dry suit is often recommended during cooler months. Access is by boat only. Divers should remain aware of variable currents and active boat traffic in the area, particularly during surface ascents, and are advised to use a surface marker buoy.