Snorkeling Ishigaki: Phantom Island & Sekisei Lagoon

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Free cancellationTravelers' pick

1/21

Duration2h

GroupUp to 100

LanguagesEN · JA

PickupAt your hotel

Snorkel a sandbar that vanishes with the tide, surrounded by Japan's largest coral reef

Snorkel around Phantom Island in Ishigaki's Sekisei Lagoon, a sandbar that emerges only at low tide and shifts size with the water level. A live guide in English or Japanese leads the activity, provides all snorkeling gear and a life jacket, photographs you with a waterproof camera during the tour, and gives you the photo data free. The tour runs about two hours and includes a hot shower afterward.

The Experience

What makes Phantom Island worth the trip is that it exists only when conditions align—the sandbar rises from the seafloor at low tide, surrounded by an unobstructed 360-degree view of open ocean. The island itself is small, but the water around it is part of Sekisei Lagoon, Japan's largest coral reef and a protected area within Iriomote Ishigaki National Park. You'll spend the time in the water with a mask and fins, moving through the reef rather than watching it from a boat.

The guide handles the logistics: they provide the snorkeling mask, fins, life jacket and wetsuit (in winter), and they take your pictures underwater with a dedicated waterproof camera so you don't have to worry about your own gear getting wet. You meet at Ishigaki Port Remote Island Terminal, and the guide will send meeting details the day before. The activity runs about two hours in the water. Afterward, you can use the hot shower near the port—ask the guide where it is.

The tour operates in light rain but may cancel if conditions turn unsafe. Ages 3 to 59 only; pregnant travelers and those with certain medical conditions should contact the operator beforehand. Wear swimwear, use the restroom before you arrive (there are no facilities on-site), and avoid alcohol. The guide speaks English or Japanese depending on the tour, so confirm the language when you book if that matters to you.

What’s included

All snorkeling equipment (mask, fins, life jacket, wetsuit in winter).
guide in English or Japanese.
free underwater photography and photo data.
hot shower access.
experience fee, liability insurance and sales tax.

Good to know

Easy physical levelInfant seats availablePublic transport nearbyNot for pregnant travelersNot for heart conditionsNot for back problems

Operated by ISHIGAKI ADVENTURE PiPi

Is this one for you?Book this tour if you're comfortable following a guide's instructions in English or Japanese—the language varies by departure, so confirm which one you're joining. The two-hour timeframe and the life jacket requirement make it accessible for swimmers of all levels, though anyone with concerns about ocean conditions or their own strength should contact the operator beforehand.