The site is located at the southeastern foot of Mount Fuji at an altitude of 398 meters along a ridge extending north-to-south. It was discovered before World War II, but was only excavated from the 1970s. The site was found to contain the foundations of twenty pit dwellings arranged in a ring surrounding a 50-meter diameter central plaza. Each pit dwelling was from three to 7.3 meters in diameter, with some of the foundations overlapping. Numerous Jōmon period pottery shards were also recovered from the site. The entire site was covered in a layer of ash from the eruptions of Mount Fuji.