Komakino stone circle in Aomori Prefecture, Japan, one of several megalithic sites constructed by the Jomon culture, which spanned approximately 10,000 years from 13,000 years ago to 2.300 years ago. The stone circles were constructed in the later period and date from around 4,000 years ago.
Japan - Jomon Nonakado circle
This is one of a pair of stone circles of the Jomon Neolithic culture in Akita Prefecture in northern Japan. Age is approximately 4,000 years old.