1. Structural Design Division, Engineering Dept., Nikken Sekkei
2. Structural R&D Dept., PAL Corporation
3. Engineering Dept., Yamasa Mokuzai Co., Ltd.
4. Yamasa Mokuzai Co., Ltd.
5. Faculty of Architecture, KINDAI Univ.
6. Grad. School of Agri. and Life Sci., Univ. of Tokyo