Kashiwajima Island features a reef environment with depths ranging from 3 to 23 metres. The site offers visibility between 15 and 50 metres, providing clear conditions for beginners. Access is strictly by boat, and divers should be prepared for moderate to strong currents that can shift with little warning. The reef structure supports a variety of marine life, including juvenile fish, nudibranchs, and various gobies. Facilities at the location include parking, showers, toilets, and a dive shop offering equipment rental. Divers should monitor water movement throughout their session and remain close to the boat or guide to manage current conditions safely.

Kode no dokutsu is a cave dive located 1000 metres offshore from Kashiwajima. The site features a cave system with depths ranging from 10 to 25 metres, averaging 18 metres. Divers must navigate a mild current and maintain precise buoyancy control to avoid contact with the cave structure. Due to the overhead environment, this site is suitable for intermediate divers with appropriate cave training. Access is by boat only, and a typical dive lasts 50 minutes. Visibility varies between 5 and 15 metres. Divers should carry both a primary and backup torch for safety when exploring the cave interior.

South Rock is a wall dive located 1000 metres offshore from Kashiwajima, Japan. The site features a wall dropping to a maximum depth of 25 metres, with an average depth of 30 metres. Divers should expect moderate currents, which necessitate solid buoyancy control and careful planning around slack water periods. Visibility at the site typically ranges between 10 and 20 metres. Water temperatures fluctuate seasonally, ranging from 18C in the winter months to 26C in late summer. Access to this site is exclusively by boat. Due to the current and depth profile, this location is best suited for intermediate divers.

Akahae is a reef and drift dive site located off Kashiwajima, Japan. The site features hard coral structures and reaches depths of up to 20 metres. Due to the presence of strong currents, this location is suited for intermediate divers who possess confident buoyancy control. Boat access is required for all dives. Divers should carefully monitor current timing, as the flow can be intense and may significantly impact dive duration. Visibility at the site is variable, requiring divers to be proficient in site reading. As local facilities are unconfirmed, divers must arrive self-sufficient with all necessary equipment, including a surface marker buoy.

Senohama Reef is an artificial reef located off Kashiwajima, Japan. The site features a structure resting at depths between the surface and 12 metres, providing a suitable environment for beginner divers. Access to the reef is by boat only. The site is characterised by mild currents, allowing for a relaxed exploration of the artificial structure. Water temperatures fluctuate throughout the year, ranging from 18C in the winter months to 27C during the summer. As visibility at this site is variable, it is recommended to consult with your charter operator regarding recent conditions before planning your dive.

Nishiumi is a reef site located in Kashiwajima, Japan, offering depths between 8 and 18 metres with an average of 12 metres. Divers can expect visibility ranging from 10 to 25 metres. The site features a mix of reef structures, including rubble and encrusted surfaces. Conditions are generally manageable with mild currents, though localised stronger surges can occur. Entry is possible via both shore and boat. Divers should exercise caution regarding sharp coral and rock formations to avoid injury. Guided tours and air fills are available on-site to assist with navigation and safety.

Kurohae is a drift dive located off Kashiwajima, Japan, characterised by moderate to strong currents. The site features a reef structure extending from the shallows to a maximum depth of 22 metres. Divers should be prepared for varying current speeds, which can shift from manageable to demanding depending on the tidal phase. Due to these conditions, the site is suited for advanced divers. Entry is exclusively by boat. Divers must monitor their depth gauge and current conditions closely throughout the dive. Carrying a surface marker buoy is recommended for the ascent, and checking tide tables with your boat operator is essential for planning a safe drift.

Koyoko Island in Kashiwajima features a diverse reef and cave system ranging from 5 to 40 metres in depth. The site is accessible only by boat and is suited for intermediate divers due to moderate currents and the presence of overhead cave environments. Visibility typically spans 15 to 30 metres, with water temperatures fluctuating between 17 and 25 degrees Celsius throughout the year. Divers exploring the caves should maintain solid buoyancy control and carry a torch. Given the overhead environment and current, ensure you possess the appropriate training and comfort level for confined spaces before planning a visit to this site.