Oyashirazu is a shore-entry reef site located on the Izu Peninsula, Japan. The reef sits at depths between 5 and 13 metres, with an average depth of 6 metres, making it suitable for beginners. Divers and snorkellers can expect mild currents and visibility ranging from 5 to 20 metres. The site features rocky sections and crevices. Entry requires caution due to surf and a shore break; it is recommended to observe wave sets before entering. Facilities available on site include parking, showers, and a cafe. A typical dive lasts approximately 45 minutes.

Namerikawa is an artificial shore dive located on the Izu Peninsula in Japan. The site offers depths ranging from the surface down to 14 metres, making it accessible for beginner divers. Conditions are generally mild, though visibility is variable and can occasionally drop to zero. Water temperatures fluctuate significantly throughout the year, ranging from 11 to 27 degrees Celsius. Due to the risk of cold water and potential for low visibility, divers should use caution and carry a torch even during daylight hours. On-site facilities include parking, toilets, showers, changing rooms, and a rinse station, supporting a comfortable post-dive experience.