| No. | 58 |
| Description | Interior-lug (Naiji) pottery |
| Site | Raitokoro Kawaguchi Site: from the fill of Pit House 7 |
| Size (cm) | H. 7.3 |
| Period | Ainu |
| Date | 15th century |
| Possessor | Tokoro Research Laboratory |
| Comment | Interior-lug (Naiji) pottery, pottery with lugs in the interior for hanging strings, is considered to be an imitation of iron pans. In Hokkaido, it was created during the 13th to the 15th century, and it is one of the distinctive artifacts of the Ainu culture of this period. |