| Nominative | jakuza |
| Genitive | jakuzy |
| Dative | jakuzie |
| Accusative | jakuzę |
| Instrumental | jakuzą |
| Locative | jakuzie |
| Vocative | jakuzo |
| Nominative | jakuzy; jakuzowie |
| Genitive | jakuz; jakuzów |
| Dative | jakuzom |
| Accusative | jakuzy; jakuzów |
| Instrumental | jakuzami |
| Locative | jakuzach |
| Vocative | jakuzy; jakuzowie |