Yamaichi Electronics Co., Ltd.
- Head Office [Tokyo]
- Sakura Factory [Chiba]
- Osaka Branch Office [Osaka]
- Kumamoto Branch Office [Kumamoto]
Group Company
- Matty Co., Ltd. Head Office [Okayama]
- High Enpla Co., Ltd. [Toyama]
- Koshin Kogaku Co., Ltd. Head Office [Kanagawa]
- Koshin Kogaku Co., Ltd. Togawa Plant [Kanagawa]