| Ikuei Junior College | |
| iLand6 Co., Ltd | Tokyo |
| Im Data Co., Ltd | Tokyo |
| ImageONE Co., Ltd | Tokyo |
| ImaHima, Inc. | Tokyo |
| iMed Technologies Co., Ltd | Tokyo |
| IMES Co., Ltd | Kanagawa |
| IMG SRC, Inc. | |
| Impress Corporation | Tokyo |
| IMV Corporation | |
| Ina Research Co., Ltd | Nagano |
| Inagora, Inc. | |
| Incal Co., Ltd | Tokyo |
| INCJ Co., Ltd | Tokyo |
| Incoming.jp | Tokyo |
| Incubate Fund | Tokyo |
| Independent Incubator | Tokyo |
| Industrial Marketing Consultants Co., Ltd | Tokyo |
| Industrial Research Center of Shiga Prefecture | |
| Industrial Research Institute of Ishikawa | |
| Industrial Technology Center of Wakayma Prefecture | |
| Industrial Technology Institute, Miyagi Prefectural Government | |
| Indy Japan Co., Ltd | Tokyo |
| Inet Communications | Tokyo |
| Inetd Co., Ltd | Tokyo |
| Infinity Co., Ltd | Tokyo |
| Infinity Venture Partners | Tokyo |
| Influx Co., Ltd | Tokyo |
| Infoaxia, Inc. | Tokyo |
| Infobahn, Inc. | |
| Infocom Corporation | Tokyo |
| InfoNet Co., Ltd | Tokyo |
| Infor Japan | Tokyo |
| Information Business Co., Ltd | Tokyo |
| Information Development Co., Ltd | Tokyo |
| Information process System Institute Co., Ltd | Tokyo |
| Information Processing Information Society | Tokyo |
| Information Science and Technology Association Japan | Tokyo |
| Information Services International-Dentsu Ltd | Tokyo |
| Information Technical Center Co., Ltd | Tokyo |
| Information Technology Works Ltd | Tokyo |
| Information-Technology Promotion Agency, Japan | Tokyo |
| Informatix, Inc. | Tokyo |
| Infortech, Inc. | Tokyo |
| Infoscience Corporation | Tokyo |
| Infostellar | Tokyo |
| Infotechnica | Tokyo |
| Infrastructure Development Institute-Japan | |
| IngSystem Corporation | Tokyo |
| Innophys Co., Ltd | Tokyo |