Nonakado Stone Group from Japan, late Jomon (Jomon period--14,000 BC to about 300 BC) Oyu Site - Towada. It seemingly represents a sundial, you can see three of the 'quarter' stones, and there is apparently nothing like it on the Continent, and the information states, that it could come from as far a field as Siberia to the Mongolian Steppes, where many types of stone arrangements are found. Text and photo from North Stoke blog
Towada Travel: Mount Hakkoda (Hakkodasan) At the northern base of Mount Hakkoda is the Tashirotai Marshland, a former caldera lake that has turned into a marsh. Visitors can explore the area along a network of aging elevated boardwalks and see a variety of swamp vegetation including bog rosemary, day lilies and azalea bushes.