1. Technical Research Labs., Kawasaki Steel Corp., now Research & Development Lab., Kawatetsu Mining Co., Ltd.
2. Mizushima Works, Kawasaki Steel Corp., now West Japan Works, JFE Steel Corp.
3. Technical Research Labs., Kawasaki Steel Corp., now Process & Product Technology Business Division, Kawasaki Steel Techno-research Corp.
4. Technical Research Labs., Kawasaki Steel Corp., now Patent & Technical Information Business Division, Kawasaki Steel Techno-research Corp.