Covering only five hectares, Sarushima is just a tiny island. But despite its small area, there are already plenty of things to do and enjoy for a whole day of stay.

The Tokyo bay is a 580 square-mile body of water  that served a very vital role in the growth of Japan. Surrounded by three prefectures ,Tokyo, Kanagawa and Chiba, it was called uchi-umi or “inner sea” during ancient times. As of today, within its vast surface you’ll see nine small islands for which eight of them are man-made.

Sarushima Island, which is part of Yokosuka City in Kanagawa Prefecture, stands out to be the only natural island in Tokyo Bay. Literally, the name translates to “monkey island” although there are actually no monkeys natively living in it.

Sarushima’s strategic location was very important for the defense of the nation’s capital. For centuries, it served as a military base and a navy yard. Tunnels, barracks and artillery batteries where constructed within this small island.

While remains of these facilities can still be found, Sarushima today is no longer a place for shooting guns. It has been developed as a recreational island known to be a good place for weekend sightseeing.

Sarushima Sights and Scenes

Sarushima is an ideal place to relax and get a break from the big city. Very much accessible, it is reachable from Tokyo and Yokohama area in under two hours. From Mikasa port of Yokosuka, the island is fifteen minutes away by boat.

Though Sarushima is very close in terms of proximity, its ambiance gives you a sense of being somewhere remote.

Sarushima is popular among friends and families who want to have a weekend barbecue together. You can pitch your tents and lay you picnic mats on the sand or use the readily available chairs and tables. A nice beach and a view of the Tokyo bay mixes very well with good dining and companions.

Right at the island’s port is a small museum where visitors can make a first stop and learn about Sarushima’s history and how some of the its structures were constructed.

The island has been a military base for quite some time. And one of the unique things to experience in Sarushima is exploring the remains of its old facilities.

Walking paths are available for visitors to follow which lead to a number of interesting structures from over half a century ago like old barracks, brick tunnels, fortified walls and other military structures.

The walking trail can be completed in under two hours or even much less so there is no need to be in a hurry. Taking time and looking at the details of every scene would make you appreciate the rich history of Sarushima.

Much of the island is covered in tall trees but there are certain viewing spots where visitors are greeted by a striking view of the sea.

The walking trail also leads to a few stairways that go down to Sarushima’s rocky shore.  Aside from being a magnificent sight, it is also a good spot for fishing. Fishing rods are available for rent.

If fishing is not your thing, just walking along the shore and sitting on the rocks is already therapeutic and relaxing.

Covering only five hectares, Sarushima is just a tiny island. But despite its small area, there are already plenty of things to do and enjoy for a whole day of stay.

How to get to Sarushima

The nearest train station to Sarushima is Yokosukachuo station of Keikyu Line. Travel time from Yokohama station is around thirty minutes. Fare is 360 Yen.

From Yokosukachuo station, walk by foot to Mikasa Park which takes about fifteen minutes. Here, there are boats that take you to the island (roundtrip fare is 1200 yen for adults and 600 yen for children).

Sarushima Facilities Information


  • Admission : 200 yen
  • Round trip fare : 1200 yen (adult), 600 yen (children)


  • First ferry leaves Mikasa port at 8:30 am
  • Last ferry leaves Sarushima at 5:00 pm


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