| No. | 15 |
| Description | Utsunai Ⅱa type pottery |
| Site | Sakaeura Ⅰ Site: on the floor of Pit House 4D |
| Size (cm) | H. 54.4 |
| Period | Early Epi-Jomon |
| Date | 4th century BC-1st century |
| Possessor | Tokoro Research Laboratory |
| Comment | Utsunai Ⅱa type pottery shows a tendency to have developed appliqué decoration with the passage of time. Another change is that the front and the side of the pottery become different in terms of the design of the patterns and in the shape of the rim projection. |