| Sepen | |
| Also Known As: | Akukem |
| Nativename: | Akɨghɨm |
| States: | Papua New Guinea |
| Region: | Madang Province |
| Speakers: | 650 |
| Date: | 2003 |
| Ref: | e18 |
| Familycolor: | Papuan |
| Fam2: | Ramu proper |
| Fam4: | Misegian |
| Iso3: | spm |
| Glotto: | sepe1240 |
| Glottorefname: | Sepen |
Sepen is a Ramu language of Yawar Rural LLG, Madang Province, Papua New Guinea. Speakers prefer the name Akukem.