Gate Tower Building

Brief Information

At the Gate Tower Building, the road does not take up space next to the building, but three of its floors. A section of the Hanshin Expressway passes through the space from the 5th to the 7th floors, so after the 4th floor the elevators go straight to the 8th. This strange gap in the numbering helps reveal the main point: here, an ordinary office tower and an urban highway were brought together at one point, but did not become a single structure.

This solution emerged after lengthy negotiations between the landowners, the road corporation, and the city authorities. Local regulations were revised for the project, allowing a building and the road network to be combined within a single space. As a result, the Gate Tower Building became the first building in Japan through which a highway passes; what is rare is not its height, but the way a legal conflict turned into a visible form.

What to Notice First

It is worth comparing the building’s cylindrical reinforced-concrete form with the straight passage of the highway through the middle floors. The structure is described as having a double core: this matters because the road does not rest on the building and does not touch it, but passes like a separate bridge through an opening on its own supports. Therefore, the “hole” in the tower is not a decorative gesture, but a technical separation of two independent systems.

The next detail is the floors that do not exist for the elevator: the 5th, 6th, and 7th are occupied by the road and are even described as space rented by it. The tunnel walls have sound insulation, and measures against noise and vibration are used to protect the building. There is a helipad on the roof; together with the skipped floors and the roadway inside, it emphasizes that the building is read not only from bottom to top, but also as a node of movement.