| Fonfun Corporation | Tokyo |
| Food and Drug Safety Center | |
| for Startups, Inc. | |
| Forcenet Co., Ltd | Tokyo |
| Forest Co., Ltd | Tokyo |
| Forest, Inc. | |
| Foretech Co., Ltd | Tokyo |
| Forum Frontier Network Co., Ltd | Tokyo |
| Foundation for Biomedical Research and Innovation at Kobe | |
| FoundX | Tokyo |
| FPT Japan Holdings Co., Ltd | Tokyo |
| Frame00 Co., Ltd | Tokyo |
| FreakOut Shinsei Fund | |
| Freebit | Tokyo |
| Freedom Networks, Inc. | Tokyo |
| Freee Co., Ltd | Tokyo |
| FREESTATION, Inc. | |
| FromSoftware, Inc. | Tokyo |
| FS Software Development Co., Ltd | Tokyo |
| Fubuki | Tokyo |
| Fuchu Internet | Tokyo |
| FueTrek Co., Ltd | Tokyo |
| Fuji Electric Holdings Co., Ltd | Tokyo |
| Fuji Infox-Net Co., Ltd | Tokyo |
| Fuji Networks Co., Ltd | Tokyo |
| Fuji University | |
| Fuji Women's University | |
| Fuji Yakuhin Co., Ltd | Saitama |
| FUJIFILM Corporation | Tokyo |
| Fujikura Ltd | Tokyo |
| Fujisoft, Inc. | Kanagawa |
| Fujita Health University | |
| Fujitsu | |
| Fujitsu Ltd | Kanagawa |
| Fujitsu Systems Applications & Support Ltd | Tokyo |
| Fujix Co., Ltd | |
| Fukui Computer, Inc. | Fukui |
| Fukui University of Technology | |
| Fukul Prefectural University | |
| Fukunishi Electrical Co., Ltd | |
| Fukuoka Financial Group, Inc. | |
| Fukuoka Institute of Technology | Fukuoka |
| Fukuoka International University | |
| Fukuoka Prefectural University | |
| Fukuoka University | |
| Fukuoka Women's Junior College | |
| Fukuoka Women's University | |
| Fukushima College | |
| Fukushima Medical University | |
| Fukushima University | |