Explore Sarushima, the only natural island in Tokyo Bay, on a half-day trip from Yokosuka. Stroll along quiet beaches, wander through forested trails, and explore mysterious military ruins now wrapped in lush greenery.

Meet your guide at Yokosuka-Chuo Station and walk to the port together. Board the ferry to Sarushima, meaning “Monkey Island.” Step off the ferry and into a peaceful escape where time seems to slow down.

Walk the whole island, exploring historic ruins, such as brick tunnels, old gun batteries, stone paths, and walls. Learn why this site is called a “real-life Laputa” due to its overgrown ruins and mystical vibe.

For people who wish to stay on the island longer, have a picnic, enjoy some refreshing Yokosuka Craft Beer and finger food, and take the next ferry back. For people who wish to visit the souvenir store and have lunch, return to Yokosuka during noon.