The structure and size of the stone circles

The Nonakadō and Manza stone circles are more or less structured the same with two layers of circles consisting of more than 100 stones (component stones) sized about 1–2 m. Moreover, one “sundial stone” is located in a special place between the inner and outer layers. Furthermore, the Manza stone circle has entryways to the north, south, and south-southeast, while the Nonakadō circle has entryways to the south and north-northwest. The Nonakadō circle has a diameter of 44 m, while the Manza circle has a diameter of 52 m. The stone arrangements that make up the circles are not evenly distributed across the inner and outer layers as the inner layers have congregations of stones in six places while the outer have congregations in 12 or 13 places.