1. Hikari R & D Lab.,Nippon Steel Corp.,now Research & Development Center,Nippon Steel & Sumikin Stainless Steel Corp.
2. Steel Research Labs.,Nippon Steel Corp.,now Head Office,Nippon Steel & Sumikin Stainless Steel Corp.
3. Hikari R & D Lab.,Nippon Steel Corp.,now Nagoya Sales Office,Nippon Steel & Sumikin Stainless Steel Corp.
4. Yawata R & D Lab.,Nippon Steel Corp.
5. Steel Research Labs.,Nippon Steel Corp.,now Industrial Property Corporation Center
6. Hikari Works,Nippon Steel Corp.,now Head office,Nippon Steel & Sumikin Stainless Steel Corp.