| Name | Region |
|---|---|
| Zestec Co., Ltd | Tokyo |
| Zionex Co., Ltd | Tokyo |
| Zitte Corporation | |
| ZMP Co., Ltd | Tokyo |
| ZMP, Inc. | Tokyo |
| Zo Digital Japan | |
| ZOA Corporation | Tokyo |
| Zokei Co., Ltd | Tokyo |
| Zooog Co., Ltd | Tokyo |
| ZTV Co., Ltd | Mie |
| ZubaTech Co., Ltd | Tokyo |
| Zucks Co., Ltd | Tokyo |
| Zuken, Inc. | Kanagawa |
| Zukosha | Hokkaido |
| Zumensoft | Tokyo |
| Zynas Co., Ltd | Tokyo |
| ZYYX, Inc. |