The Gate Tower Building is a 16-floor office building in Fukushima-ku, Osaka, Japan. It is notable for the highway offramp of the Ikeda Route that passes through the building. The building has a double core construction, with a circular cross-section. The Umeda exit of the Ikeda Route of the Hanshin Expressway system passes between the fifth through seven…The Gate Tower Building is a 16-floor office building in Fukushima-ku, Osaka, Japan. It is notable for the highway offramp of the Ikeda Route that passes through the building. The building has a double core construction, with a circular cross-section. The Umeda exit of the Ikeda Route of the Hanshin Expressway system passes between the fifth through seventh floors of the building. The highway is effectively the tenant of those floors. The elevator passes through the floors without stopping, with floor 4 being followed by floor 8. The floors through which the highway passes consist of elevators, stairways and machinery. The highway does not make contact with the building. It passes through as a bridge, held up by supports next to the building. The highway is surrounded by a structure to protect the building from noise and vibration. The roof has a helipad.