This Paper examines the Architectural works and activities of Isaburo Ueno. He went to Berlin and Wien to study architecture in 1920's after graduated from Waseda Univ. in Tokyo. He worked at Josef Hofmann's studio, and got married with a Wiener Werkstätte designer Felice Lizzi Rix. After he came back to Japan, he established his own architectural studio. He founded 'The International Architectural Association of Japan' in 1927, and became the chairman of the association. He designed architectures based on modernism, while he applied some ornaments on his works. That ornaments designed by his wife Lizzi, as the collaborationist. Then after World War II, he devote to education of architecture and design.