Sanbondake is about an hour’s boat ride from Miyakejima and is officially called Onohara Island. It is an uninhabited reef floating off the coast of Miyakejima. This site is for advanced divers only due to the strong current. This dive is a complete drift style dive. It is only possible to dive when sea conditions and currents are right. It is the most dynamic point in Miyakejima, where large schools of fish and large migratory fish can be seen.

Located in the northern part of the island, this is the main dive site of Miyakejima. This is a beach entry only. The terrain is formed by lava flowing into the water, with roots protruding offshore. There is a fairly large area to the east and west of the dive site, and you can’t go all the way around on one dive.

Senzu is located 36 km southwest of Jinzu Island in the Izu Seven Islands and consists of three reefs. It takes one and a half hours one way from Jinzu Island, three and a half to four hours one way from Shimoda, and five hours from Nishi-Izu, and can only be reached by charter boat.

Nazumado is on the west side of the island where you can see Hachijo Kojima in front of you. This dive site is set up very uniquely with ropes to help you enter and exit from a walled reef that falls sharply down the slope.

This site is at the southwestern point of the island. Although it is a beach entry, there is a large cave and many nudibranchs around it, making it a popular spot. Entry and exit are done from the dedicated stairs.

This dive site, situated at the southernmost tip of Mikomoto Island, is renowned as the prime location for encountering hammerhead sharks and white-tip reef sharks. It stands out as the foremost spot for such encounters.

During early summer, hammerhead sharks gather in large schools at this location, circling repeatedly in a captivating manner. Divers can enjoy extended observation periods as the sharks navigate around roots or rest on rocks.

There are a number of diving spots around Kamikimoto Island, an uninhabited island off the coast of Shimoda. It is a 20-minute boat ride from the harbor to the dive site. It is a popular spot for hammerhead sharks to appear from summer to autumn when the Kuroshio Current approaches the Izu Peninsula.

Situated offshore Enokuchi and Mitsu-ne on Kamikomoto Island, this site is highly affected by tides. The depth of the reef ranges from 22 to 25 meters, peaking at 19 meters towards the end before descending sharply to 45 meters. Due to significant tidal influence, it’s considered a challenging dive, particularly for beginners.

The point, situated on the north side of Mikomoto Island, experiences the influence of both low and high tides. Notably, the three roots exhibit symmetry, with the west side being flat and gradually deep, while the east side features clustered roots.