was a Japanese architect. She was the first woman to win the Architectural Institute of Japan Award.

Career Hayashi primarily designed residential housing for limited space environments, using innovative building materials, space utilization and clean design. In 1958, Hayashi co-founded the Hayashi, Yamada, Nakahara Architectural Design Coterie with Hatsue Yamada and Nobuko Nakahara.

She was the first woman to win the Architectural Institute of Japan Award.

Personal life She was married to architect Shoji Hayashi.

Notable awards American Institute of Architects Honorary Fellowship Architectural Institute of Japan Award

Notable works Umi no gyararī (Gallery of the Sea), Tosashimizu, Kōchi, JapanUmi no gyararī at the website of Tosashimizu, retrieved 10 June 2019.

Further reading Works by Masako Hayashi House design in today's Japan. Tokyo: Shokokusha, 1969. with Kiyoshi Kawasaki. Modern Architects's Collected Works 22 Masako Hayashi, Kiyoshi Kawasaki. Japan: San-Ichi Shobo, 1975.

References