Key Operation Inc. is an architectural practice directed by Akira Koyama based in Tokyo, Japan. We work on various type of projects such as housing, offices, commercial buildings, complex buildings. Our aim is to find the simplest and the most innovative space composition, construction method or other architectural technique that does tackle the different problems and give a coherent, clever, logical solution. We investigate and analyze the customer’ s requirements, observe the urban context, understand the social interactions, acknowledge local history, culture, and natural environment.