| Country | Japan (JP) |
| UN/LOCODE | SEI |
| Name | Seki |
| Name Without Diacritics | Seki |
| Region | 21 |
| Function Code | 1------- |
| Function | Port |
| Status Code | RL (Recognised Location) |
| Date | 1807 |
| Timezone | Asia/Tokyo |
| Location (UN Format) | 3529N 13655E |
| Latitude Longitude | 38.5603, 139.5495 |