| Kagura | — | — | — |
| Kaidō Battle | 2 | racing video game | — |
| Kaiju Princess | 3 | erotic video game, social simulation game | — |
| Kaizo Mario World | — | Kaizo | — |
| Kaku-San-Sei Million Arthur | — | variety show | — |
| Kamen Rider: Climax | — | crossover fiction, fighting game | Bandai Namco Entertainment |
| Kanazawa Shogi | 1 | shogi video game | UNBALANCE |
| Kao the Kangaroo | 6 | platform game | — |
| Katamari | 14 | — | Namco |
| Keio Flying Squadron | 2 | — | — |
| Keitai Denjū Telefang | — | role-playing video game | Smilesoft |
| Kemono Friends | 6 | — | — |
| Kengo | 4 | action game | — |
| Kero Kero Keroppi no Daibouken | — | action game | Character Soft |
| Kessen | 3 | — | Electronic Arts, THQ, Koei |
| Kick Off | 5 | association football video game | — |
| Kid Icarus | 2 | platform game | Nintendo |
| Kidz Sports | 7 | association football video game | Destineer |
| Killzone | 8 | first-person shooter | Sony Interactive Entertainment |
| King Games | 3 | — | — |
| King's Field | 4 | role-playing video game | — |
| King's Quest | 12 | adventure video game | IBM |
| Kingdom Hearts | 17 | hack and slash, action role-playing game, crossover fiction, rhythm game, role-playing video game | Square Enix, Square |
| Kin’iro no Corda | 3 | otome game, simulation video game, visual novel | — |
| Klang | 2 | — | — |
| Klonoa | 9 | platform game | Namco |
| Knockout Kings | 4 | — | EA Sports |
| Koihime | 3 | bishōjo game | — |
| Koihime Enbu | 3 | fighting game | — |
| Konami Antiques MSX Collection | 3 | — | — |
| Kroz series | — | maze video game | Apogee Software |
| KuruKuru Princess | 3 | figure skating video game | Spike |
| Kuukiyomi | 5 | — | — |
| Kōryū Densetsu Villgust | — | comedy anime and manga, action anime and manga, fantasy anime and manga, role-playing video game | — |