Fussa City Hall is located about 50 km away from Tokyo city center in a dense residential area.
The landscape conforms to the local topography: low hills stepping up from the banks of the Tama River.
The lower levels of the city hall called as “Forum”, are the ones open to the public and used by the citizens. They are placed under an undulated organic roof, from where two twin towers rise. The roof itself is a green public space for citizens daily life as well as a place for various events and activities. The greenery on the roof makes the building more energy efficient reducing energy losses and helping to integrate it into the surrounding environment.

The two towers containing the main offices, provide the city hall with a strong iconic image. In order to provide the offices with a maximum of space quality, the main idea is to place the structure of the building on the exterior façade avoiding structure elements in the working space. The pillars and beams of the outer skin structure become thinner on the upper parts of the tower, helping the building to look light and soft towards the sky. The factory-made, pre-cast concrete is used for the slab and outer skin structure. Pre-cast concrete is a high-performance material, it is earthquake resistant and suits the speedy constructions. Using this construction system the government offices and assembly functions needed in the city hall have no limitations and the distribution of the interior is free and flexible according to the users preferences.