Cage Tower reinterprets Japan’s strict shadow and height regulations as a generative force for architecture. The building mass is carved from the regulatory “cage” volume, transforming legal constraint into spatial opportunity. Rather than a conventional office building, it is conceived as a new headquarters for a Japanese mobility-related company, translating regulation, movement, and public life into architectural form.
Planned as a 20-story headquarters with 2 basement levels, the project rises to approximately 90 meters through a comprehensive design system that allows height relaxation beyond the standard 60-meter limit. With a total floor area of approximately 46,000 m², it proposes a new model for the contemporary urban headquarters. The sectional organization is clear: lower levels accommodate showrooms and public functions, middle levels contain meeting spaces and a cafeteria, and upper levels are dedicated to offices and executive floors.
The lower levels form an open civic platform with showrooms, exhibition spaces, cafés, and public amenities that connect the headquarters to the city. Above, cascading terraces introduce greenery into the dense metropolitan fabric while mediating daylight, regulation, and urban visibility. Their stepped composition evokes the layered scenery of Japanese terraced rice fields, reinterpreted here as a vertical urban landscape.
The tower employs a seismic-isolated timber hybrid structure, combining high-rise performance with warm, human-centered workplace environments. Bold cantilevers and horizontal layering give the building a strong sense of speed and upward motion. What begins as a regulated volume is transformed into a dynamic silhouette suggesting acceleration, making the architecture itself a symbolic expression of mobility. In this project, regulation is not a limitation but a catalyst, turning the regulatory cage into an open contemporary headquarters defined by movement, landscape, and civic engagement.