por Symposium On Thin-walled Structures And Space Structures Tokyo 1967 | Doboku Gakkai.
por Symposium On Effective Use Of Digital Computers In Structural Design.
por Doboku Gakkai | Nihon Kenchiku Gakkai | Nihon Gakujutsu Kaigi.
por Japan Society of Civil Engineers.
por Symposium On The High-rise And Long-span Structures, 10 1963.
por Doboku Gakkai.
por Seminar On Precast Concrete Construction In Seismic Zones (1986 : Tokio) | Nihon Gakujutsu Shinkokai | National Science Foundation (Estados Unidos).