No.289 remains of pit-dwelling
| Time Period | Middle Jomon period |
| Excavation Report | |
| Excavation Report Figure No. | |
| Major Axis | 不明 |
| Explanation | At the Sannai Maruyama site, most of them are circular or oval in shape, with an average length of 4 meters and a floor space of about 10 square meters. |