Here is what CNN published about Sarujima.
“For as long as anyone can remember, the rock that guards the entrance to Tokyo Bay has been called Sarushima — ‘Monkey Island’ — even though there’s not a simian in sight. But for a day of monkeying around, it may be the perfect location.
Located 1.7 km off Yokosuka, Monkey Island is the only parcel of land in the bay that does not have cliffs and beaches made of concrete. This makes it a therapeutic day out for anyone who has grown tired of the urban jungle and fancies a bit of the wild.”
We took the ferry because it’s the only way to get to the island. It was about 10 minutes ride and felt like we had barely left the port. There are no guides or much else open on Mondays, so we did as usual – wander around looking lost for a while, then striking off on a decided route. Often the decided path is just the direction we’re wandering in. We were hoping for some kind of snack foods, but alas, that’s not available on Mondays either. We ate our nuts and berries, picked up a walking stick, and started uphill.
This island at the mouth of Tokyo Bay was recognized as a strategic location for defending the nation and military facilities were constructed there during the Tokugawa Shogunate. During WW II artillery posts were added. What remains now are the concrete posts and bolts, brick-lined tunnels and magazines, and natural vegetation – ferns and bamboo groves.
We had some more fun playing on the island, then we went back to the mainland and found a couple more places to play.
Here’s some more pictures.