Atelier bow-wow (1992), the Tokyo architecture studio led by Yoshiharu Tsukamoto
and Momoyo Kajima are known for the exploration of the use and function of space within urban environments.

Bow-Wow developed the term 'pet architecture' a style of small, ad hoc, multi-functional structures that make the most of limited space, a phenomenon in densely developed cities like Tokyo that integrate need, improvisation and ingenuity.