Begin your adventure with a short ferry ride from Yokosuka to Sarushima, Japan’s only natural island in Tokyo Bay. Often nicknamed “Japan’s Laputa” for its moss-covered ruins, echoing tunnels, and overgrown stone stairways, this uninhabited island feels like a scene straight out of a Ghibli film.

Travel with a local expert by boat to Sarushima, once a military fortress protecting Tokyo Bay. As you step ashore, be transported into another world—one filled with remnants of 19th-century gun batteries, hidden chambers, and twisting jungle paths.

Your guide will explain the island’s dramatic history, from Edo-period coastal defenses to its transformation into a modern stronghold during the Meiji era. Explore red-brick tunnels, observation posts, and stone walls now reclaimed by nature, offering a unique blend of mystery and beauty.

Enjoy tranquil walks, stunning ocean views, and photo-worthy spots around every corner. The tour includes the round-trip ferry ride and full guidance throughout the visit, ensuring you make the most of your time on this rare gem.

Whether you're a history enthusiast, Ghibli fan, or just looking for a one-of-a-kind side trip from Tokyo or Yokohama, Sarushima offers a perfect mix of nature, nostalgia, and hidden adventure.