| Kanagawa Dental University | |
| Kanagawa Institute of Technology | |
| Kanagawa Science Park | Kanagawa |
| Kanagawa University | |
| Kanagawa University of Human Services | |
| Kanamex Corporation | Kanagawa |
| Kanazawa Gakuin | |
| Kanazawa Institute of Technology | |
| Kanazawa Kiko Co., Ltd | Ishikawa |
| Kanazawa Medical University | |
| Kanazawa Seiryo University | |
| Kanazawa University | |
| Kanda Gaigo Group | |
| Kansai Gaidai University | |
| Kansai Institute of Information System & Industrial Renovation | Osaka |
| Kansai Integrated Systems Ltd | Tokyo |
| Kansai Medical University | |
| Kansai Perl Mongers | Kyoto |
| Kansai University | |
| Kansai University of Health Sciences | |
| Kansai University of International Studies | |
| Kansai University of Nursing and Health Sciences | |
| Kansai University of Social Welfare | |
| Kanto Gakuen | |
| Kanto Gakuin | |
| Karuizawa Internet | Tokyo |
| Kashi Electronics Designs | Saitama |
| Katch | Tokyo |
| Kawada Robotics Corporation | Tokyo |
| Kawamura Gakuen Woman's University | |
| Kawasaki City College of Nursing | |
| Kawasaki Yusuke | Tokyo |
| Kayac Bond Co., Ltd | Tokyo |
| Kazusa DNA Research Institute | |
| KB Software Co., Ltd | Tokyo |
| KCN | Tokyo |
| KCS Co., Ltd | Tokyo |
| KCT | Tokyo |
| KDDI Corporation | Tokyo |
| KDDI Web Communications, Inc. | Tokyo |
| Keepdata Ltd | Tokyo |
| KeepRun | Aichi |
| Keiai University | |
| Keihanna Science City | |
| Keiko Corporation | Tokyo |
| Keio University | |
| Keio University - Department of Electronics and Electrical Engineeing | Tokyo |
| Keio University - Department of Information and Computer Science | Tokyo |
| Keio University - Department of Mathematics | Tokyo |
| Keio University Quantum Computing Center | Kanagawa |