| F Ventures | Fukuoka |
| F1 Co., Ltd | Gifu |
| FA System Engineering Co., Ltd | |
| Face-To-Face Communications, Inc. | Tokyo |
| Factbase, Inc. | |
| FactBase, Inc. | |
| Fair Next Innovation Co., Ltd | Tokyo |
| Faith | Tokyo |
| Faith, Inc. | Kyoto |
| Famille | Tokyo |
| FAS-NET | Tokyo |
| Fasford Technology Co., Ltd | Yamanashi |
| FC2, Inc. | Tokyo |
| FDK Corporation | Tokyo |
| FeliCa Networks, Inc. | Tokyo |
| Feliqs | |
| Femto Partners | Tokyo |
| Fenrir, Inc. | Osaka |
| Fermelanta, Inc. | |
| Fernet Co., Ltd | Tokyo |
| Ferris University | |
| FerroptoCure | |
| Fidea Capital, Inc. | |
| Fifteen Minutes | |
| Fiju Dentsu | Tokyo |
| FileMakerPro Kyushu Users Meeting | Tokyo |
| Finance Produce, Inc. | |
| Financial Services Agency | |
| Finatext Ltd | Tokyo |
| FingerVision Co., Ltd | Tokyo |
| Finolab Co., Ltd | Tokyo |
| Fintech Association of Japan | Tokyo |
| FinTech Global Co., Ltd | Tokyo |
| First Consulting | Tokyo |
| First Create Co., Ltd | Fukuoka |
| First International Technology Co., Ltd | Tokyo |
| First Star Capital Co., Ltd | Tokyo |
| FIRSTLIGHT Capital | |
| FIS, Inc. | Hyogo |
| Fiteen Minutes Co., Ltd | Tokyo |
| Fivetag Plus | Nagasaki |
| FIXER, Inc. | |
| Fixstars Corporation | Tokyo |
| Flatt Security | Tokyo |
| Flens Co., Ltd | Tokyo |
| Floadia Corporation | Tokyo |
| Flora Co., Ltd | |
| FLUX, Inc. | |
| FM System Co., Ltd | Tokyo |
| Focus Systems | Tokyo |