1. Yawata R & D Lab., Nippon Steel Corp.
2. Nagoga R & D Lab., Nippon Steel Corp.
3. Oita R & D Lab., Nippon Steel Corp.
4. Oita Works, Nippon Steel Corp.
5. Yawata Works, Nippon Steel Corp.
6. Kimitsu Works, Nippon Steel Corp.
7. Nagoya Works, Nippon Steel Corp.