Kazuyo Sejima is a Japanese architect and director of her own firm, Kazuyo Sejima & Associates. In 1995, she co-founded the firm SANAA. In 2010, Sejima was the second woman to receive the Pritzker Prize, which was awarded jointly with Nishizawa. They were only the second partnership to be honored with this prize.

SANAA is an architectural firm based in Tokyo, Japan. It was founded in 1995 by architects Kazuyo Sejima (1956–) and Ryue Nishizawa (1966–), who were awarded the Pritzker Prize in 2010. Notable works include the Toledo Museum of Art's Glass Pavilion in Toledo, Ohio; the New Museum of Contemporary Art in New York; the Rolex Learning Center at the EPFL in Lausanne; the Serpentine Pavilion in London; the Christian Dior Building in Omotesandō, Tokyo; the 21st Century Museum of Contemporary Art in Kanazawa; the Louvre-Lens Museum in France; and the Bocconi New Campus in Milan.