Hokkaido, northern Tohoku, and Chubu are known as areas with many stone arrangements. The stone arrangements come in various shapes and sizes, including aggregations, sets, and circles. Many large-scale stone arrangements like stone circles were built in the late Jōmon period (approx. 4,000–3,500 years ago). There are several types of stone circles, including “Oshō,” “Komakino,” and “Ōyu,” that were used as collective graves, festival sites, and meeting spaces.