Near the world heritage site of Nakagusku castle is the site of Lord Gosomaru's tomb. Lord Gosomaru is the man who designed and built the castle. In this area is a large parking lot with toilets and a drink machine. There are two sets of wooden stairs that will take you to Lord Gosomaru's tomb (about half way up) and all the way to the top for a spectacular view to the Nakagusku park Oservatory and this geocache.
To get to the geocache please stop just before the final lot of stairs to the top viewing point and walk down some stairs that go the the ground. Then walk you walk around the viewing point and head into the jungle for a few meters. As soon as you leave the manmade area watch out of a narrow but deep crevice. Step over the crevice and walk a few more steps where you'll reach some bushes right on top of the tip of a cliff. An ammo can is hidden with some rocks in one of these bushes. Please don't go beyond the bushes or you'll fall way down into deep jungle never to be found again. Because of this I do not recommend going at night on on a rainy day.