Chotaro Pond

In short

Chotaro Pond (Chotaro-ike) is a natural tide pool located on the coast of the Tsubota area in the southern part of Miyakejima Island. It is a large tide pool formed when lava from an ancient eruption surrounded the sea. You can observe various marine life as the tide ebbs and flows.

• ​A natural pool surrounded by lava​​: At low tide, waves from the outside do not enter, allowing you to enjoy fish watching with peace of mind.
• ​292 species of saltwater fish​​: According to surveys by Akakokko-kan, 292 species of saltwater fish have been confirmed as of the end of September 2024.
• ​Views toward Mikurajima Island​​: From the pond at low tide, neighboring Mikurajima Island can also be seen in the distance. In summer, lifeguards are stationed on dates designated by the village.

History & Highlights

Miyakejima Island has many tide pools formed by lava that flowed out to the coast. Chotaro Pond is one of them; located on the coast of the Tsubota area in the southern part of the island, it was created when lava from an ancient eruption encircled the sea. It is about 50 meters wide, with concrete steps leading down to the water's edge.

At low tide, the continuous lava rocks serve as a breakwater, giving it the appearance of a pond. Because outside waves do not come in, you can observe fish in calm conditions. The seabed consists of black lava, so it appears dark, but once you enter the water, you will likely be surprised by its high transparency. Because a branch of the Kuroshio Current flows into Miyakejima Island, it is also characterized by many colorful southern-type fish.

Chotaro Pond is also a place where fish surveys have been conducted over a long period. The Miyakejima Nature Center Akakokko-kan, which monitors the island's nature, has been investigating saltwater fish in tide pools since 1993. At Chotaro Pond, 292 species of saltwater fish have been confirmed by the end of September 2024. With so many kinds of fish to observe, it is a popular spot not only for children but also for adults.

Tips for Visiting & Experiences

• ​Visit according to low tide​​: At low tide, outside waves do not enter, allowing you to observe fish safely inside the pond. At high tide, caution is required because waves may enter from outside the tide pool. At low tide, neighboring Mikurajima Island can also be seen in the distance from the pond.
• ​Look for fish while snorkeling​​: The intricate terrain formed by lava is also recommended for snorkeling. Be careful, as seawater flows in and out at the far end.
• ​Surrounding small tide pools​​: There are also small tide pools around Chotaro Pond. For small children, searching for creatures in those pools is also a good option.

Travel Tips

The nearest bus stop is "Miyake High School" (Miyake Koko). When heading by car, there are two signs for "Chotaro Pond" along the metropolitan road; from the fork, follow the road. On the way to the pond, there are narrow sections where only one car can barely pass, so please drive carefully. There are restrooms at the pond. In summer, lifeguards are stationed on dates set by the Miyake Village Office. The steps to the water's edge are slippery, so watch your footing. Stores where you can buy snorkeling equipment are limited on the island, so bringing your own provides peace of mind. Ocean currents around Miyakejima Island are fast, so caution is needed when entering the sea. About 1.2 km to the west lies Tairo Pond, which is rich in wild birds.