Hasegawa was born in Shizuoka, received her degree in architecture from Kanto Gakuin University (1964), trained with Kiyonori Kikutake. In 1969, Hasegawa entered Kazuo Shinohara’s lab at the Tokyo Institute of Technology as a graduate student. After two years, she became his assistant, a far greater honor and responsibility in Japan than the expression suggests in English. In 1979 she formed her own design firm, Itsuko Hasegawa Atelier, which has designed a number of award-winning buildings in Japan and abroad.
Hasegawa is an Honorary Fellow of the Royal Institute of British Architects, and has received the Avon Arts Award, the Building Contractor's Society Prize for the Shonandai Cultural Center, the Cultural Award for Residential Architecture (Fukuoka, Japan), and a Design Prize from the Architectural Institute of Japan.
- Cardiff Bay Opera House; Japan Architect, 19, 68-71, Autumn 1995
- Himi Seaside Botanical Garden; Japan Architect, 19, 64-67, Autumn 1995
- Yamanashi Fruit Museum and Garden; Japan Architect, 19, 48-57, Autumn 1995
- Niigata City Performing Arts Centre; 1993-1998. Japan Architect, 19, 44-47, Autumn 1995
- Shonandai Cultural Center, 1986-1990. (Competition awarded 1986. Design, 1986-1988; construction, 1987-1990)
- Sumida Culture Factory, 1994
- Namekawa Housing, 1998
- Itsuko Hasegawa, Academy Editions, 1993. ISBN 1-85490-202-4.
- Itsuko Hasegawa, with Stephen Dobney, Images Pub. Group, 1997. ISBN 1-875498-55-9.
- Island Hopping - Crossover Architecture, NAi Publishers, 2000. ISBN 90-5662-186-6.
- J'Lit | Authors : Itsuko Hasegawa | Books from Japan (in English)
- Itsuko Hasegawa and Anne Sch-Eou, Itsuko Hasegawa: Recent Buildings and Projects, Birkhauser Verlag AG; Princeton Architectural Press, May 1997. ISBN 3-7643-5605-7.
- Phoebe Chow, "Museum of Fruit", The Architectural Review, March, 1996, Volume CXCIX. No 1189.
- UIUC Women in Architecture
- International Archive of Women in Architecture
- Itsuko Hasegawa at the archINFORM database.