1. Takasago Research and Development Center, Mitsubishi Heavy Industries, Ltd.
2. Takasago Machinery Works, Mitsubishi Heavy Industries, Ltd., now Osaka Yakin Kogyo Corp., Ltd.
3. Takasago Machinery Works, Mitsubishi Heavy Industries, Ltd.
4. Research and Development Laboratory, Daido Steel Co., Ltd.
5. Formerly Daido Steel Co., Ltd.