Sado Island is the second-largest island in terms of area after the main island of Okinawa, and can be reached by ferry from Niigata Port in about 2.5 hours or by jetfoil in about 1 hour. In the summer, the sea is very calm and clear, and the water temperature is warm, making it very popular with divers.

Four naturally created reef islands, large and small, with a basic entry of Jetty Dive, a rare dive in Japan that is neither beach nor boat. The dive area is around Ruzaoan Island, also known as Yotsushima, the four islands. It takes 5 minutes by ferry, and the harbor is equipped with a parking lot, water supply and flush toilets. There is a wide range of life in the water and many schools of fish can be seen.

Kamo Aquarium is located on the west coast of Tsuruoka City in Yamagata Prefecture and is famous for exhibiting the largest number of jellyfish in the world. It is a well-equipped diving spot with a free large parking lot and hygienic flush toilets. With a maximum depth of 12m and average depth of 8-10m, the area is not easily affected by waves or currents, and there are many dive sites that even beginner divers can enjoy.

The diving pool attached to the store is a true diving pool designed exclusively for diving training. A large circulation clean system operates 24 hours a day to keep the water hygienic and clear. Water quality is also controlled by human hands to maintain clean water quality at all times. Shower rooms are adjacent and locker rooms are available free of charge.

Tobishima is located 39 km off the coast of Sakata City, and in August, the clarity is 20 to 30 meters. You can see the terrain dropping to 40 meters vertically. There are also a variety of corals and isoflavas, which are rare in the Tohoku region.

This is the border between Toyama and Niigata prefectures. The Oshirachi Beach is a cliff facing the open ocean, and the clarity is good, sometimes exceeding 20 meters from June to September. There are many large roots and rocks in the water, as well as arches and crevasses to enjoy the terrain.

The Okinose W-Arch is situated on the Etchu-Miyazaki Coast, at the easternmost tip of Toyama Prefecture. Located approximately 1 kilometer offshore, it faces the open ocean. The water remains clear from spring through summer, although occasional strong currents can be encountered. The water depth here is about 15 meters, and the presence of two arches side by side is an exceedingly rare occurrence on the Sea of Japan side. According to local legend, an ancient shrine once stood in this area, making it known as a power spot. Visiting this site is highly recommended.

Noto Island is located in the bay of the Noto Peninsula in Ishikawa Prefecture. The island itself can be reached by land via a bridge. There are 6 points for boat diving. With or without a C-card, you can go snorkeling and skin diving with the dolphins.

About an hour from Sendai, you can dive into the waterfall basin of Akiu Ootaki, one of Japan’s three largest waterfalls, which is one of the rarest waterfall dives in the world. Diving under a waterfall with a drop of 55 meters.

This site is beach entry only. Enter from the gravel beach, and as you descended, the Gorota stones spread out. Once off the coast, it becomes a sandy area, which has several man-made towers of sorts. The water near the entry is shallow but gradually deepens as you go offshore to a depth of over 40 meters.