Momoyo Kaijima (Kajima, Momoya; born 1969) Is a Japanese architect known for her work at Atelier Bow-wow, a studio that was founded by herself and Yoshiharu Tsukamoto.

[5] Kaijima started working with Yoshiharu Tsukamoto on competitions during their school career, and due to their successes, decided to create an Architectural studio together called Atelier Bow-Wow.

Some of her important projects include the Mado Building (2006), the House in Shinjuku (2005), the Tower of Winds (1986) and the Sendai Mediatheque (2001).

Through this process, Atelier Bow-Wow seeks for a close understanding of the relationship between inhabitants, objects, rooms and the built environment, which informs their domestic spaces.

[7] Pet Architecture focuses on the small interstitial buildings that are common around Tokyo, mirroring her work at Atelier Bow-Wow.