| Common name | Mukashi-unagi |
| Language | Japanese |
| Type | Vernacular |
| Official trade name | No |
| Rank | 2 - (Preferred common name (unique)) |
| Country | Japan |
| Locality | |
| Ref. | Johnson, G.D., H. Ida, J. Sakaue, T. Sado, T. Asahida and M. Miya, 2011 |
| Life stage | juveniles and adults |
| Sex | females and males |
| Core | |
| 1st modifier | |
| 2nd modifier | |
| Remarks | Name applied to the Family level. |