1. Engineer, Structural Engineering Dept., NIHON SEKKEI INC.
2. Business Development Div., NIHON SEKKEI INC.
3. NIHON SEKKEI INC., Kyushu Branch
4. Structural Design Section, Design Dept. OBAYASHI CORPORATION
5. Project Designing Dept., Steel Structure Div., Building Construction Div., NIPPON STEEL CORPORATION
6. Building Construction Div., NIPPON STEEL CORPORATION