| Kazuko | Woman | Japanese Names |
| Kazuma | Man | Japanese Names |
| Kazumi | Unisex | Japanese Names |
| Kazuno | Woman | Japanese Names |
| Kazuo | Man | Japanese Names |
| Kazushige | Man | Japanese Names |
| Kazutaka | Man | Japanese Names |
| Kazuto | Unisex | Japanese Names |
| Kazuya | Man | Japanese Names |
| Kazuye | Woman | Japanese Names |
| Kazuyuki | Man | Japanese Names |
| Keiji | Man | Japanese Names |
| Keiko | Woman | Japanese Names |
| Keisuke | Man | Japanese Names |
| Keitaro | Man | Japanese Names |
| Keizo | Man | Japanese Names |
| Ken'Ichi | Man | Japanese Names |
| Kenchiro | Man | Japanese Names |
| Kenchirou | Man | Japanese Names |
| Kenji | Man | Japanese Names |