| NDKCOM, Inc. | Tokyo |
| NEC Corporation | Tokyo |
| NEC Personal Computers Ltd | Tokyo |
| NEC Platforms Ltd | Tokyo |
| NEC Solution Innovators Ltd | Tokyo |
| NEC Space Technology Co., Ltd | Tokyo |
| NEEZ | Kanagawa |
| NekoLogic | |
| Neo Broadband Networks | Ehime |
| Neo Diverse, Inc. | |
| Neos Corporation | Tokyo |
| Neos, Inc. | Tokyo |
| Neosys, Inc. | Tokyo |
| Neosystem Co., Ltd | |
| Nesku Co., Ltd | Ishikawa |
| Net Links Corporation | Tokyo |
| Net Marketing Co., Ltd | Tokyo |
| Net One Systems Co., Ltd | Tokyo |
| Net Protections, Inc. | |
| Net Smile Co., Ltd | Tokyo |
| NET-ING Co., Ltd | Tokyo |
| Netage, Inc. | Tokyo |
| NETBEET | Tokyo |
| NetConnect Co., Ltd | Tokyo |
| NetForest, Inc. | Tokyo |
| NetLaputa | Tokyo |
| NetLaputa Corporation | Tokyo |
| NetLearning Co., Ltd | Tokyo |
| Netman Co., Ltd | Shizuoka |
| Netmarble Japan Co., Ltd | Tokyo |
| Netplower Co., Ltd | Tokyo |
| Netprice Co., Ltd | Tokyo |
| Netsket, Inc. | |
| Netwise | |
| Network Dynamics Co., Ltd | Tokyo |
| Network Store | Tokyo |
| Network Value Components Ltd | Tokyo |
| Networld Corporation | Tokyo |
| NEU, Inc. | Tokyo |
| Neue.cc | Tokyo |
| Neuro Technology Corporation | Tokyo |
| Neuron-Age | Osaka |
| Neusignal Therapeutics, Inc. | |
| Neutone Co., Ltd | Tokyo |
| New Energy and Industrial Technology Development Organization | |
| New Industry Research Organization | |
| New IT Venture Corporation | Tokyo |
| New Media Tokushima Co., Ltd | Tokyo |
| NewIT, Inc. | |
| NewMedia Co., Ltd | Yamagata |