Toranomon Station Tower is a recently completed mixed-use skyscraper in central Tokyo, approximately 266 meters tall with 49 above-ground floors. As a key part of the Toranomon Hills development, it incorporates Toranomon Hills subway station directly into its base, bringing the station, urban public spaces and tower together. Its most distinctive feature is an Activity Band across the center of the tower: a sequence of public and shared spaces along the central axis creates an open band around the building, forming a recognizable interface with the city. Connected to neighboring blocks by the two-level T-Deck pedestrian bridge, this band makes the tower a meeting point for surrounding green spaces and pedestrian routes. With connection at the heart of its design and a futuristic appearance, the tower has become a new model for Tokyo's urban regeneration.
A Three-Dimensional Urban Hub: Designed by OMA, the project centers on seamless connections within the urban fabric. Public functions occupy both the base and the top: the lower levels contain the new subway station, a daylit station atrium and retail walkways, while the TOKYO NODE cultural center at the top provides a shared venue for citywide cultural activities. At second-floor level, the T-Deck pedestrian bridge crosses the main road and links the Toranomon Hills areas with surrounding urban greenery. Splitting the structural core into two parts at the base opens a route for pedestrian movement into the building. The tower acts as a multidimensional urban gateway, connecting public spaces at street level, underground and in the sky to create a distinctive multilevel experience of Tokyo。
The Activity Band and Facade: The tower's form is defined by a central Activity Band encircling its middle. It contains shared spaces across multiple floors, including sky lobbies, observation lounges and meeting areas for all building users. To emphasize this arrangement, the main floor plates on the north and south sides use mirrored, opposing layouts, leaving an open central zone with views around the city and making the Activity Band visible from every direction. Slightly lighter materials and lighting distinguish its glass volumes, creating a visual focus that appears to float within the tower. At night, projected light emphasizes the band as a ring of urban energy. The high-performance glass curtain wall is punctuated vertically by projecting Sky Boxes containing gardens or suspended meeting rooms. Lighting beneath them creates a constellation-like effect at night, giving the tower both a technological character and a landmark presence.
For Toranomon Station Tower, we undertook detailed design and construction for portions of the curtain wall and structural-steel exterior. The complex long-span suspended spaces and multilevel bridges required our engineers to participate in BIM coordination from an early stage, aligning curtain wall framing with the structural steel beams. For key elements such as the Sky Box glass volumes, we developed custom unitized curtain wall modules, preassembled and adjusted them in the factory, and lifted complete units into position to reduce work at height. To meet Tokyo's demanding seismic requirements, special movement mechanisms in the connectors allow interstory displacement without compromising air tightness. Our integrated one-stop service coordinated interfaces between trades and realized the landmark's innovative design through precise construction.
Toranomon Station Tower's emphasis on connection and multilevel public space makes the building part of the city's infrastructure. It is a vertical hub linking people, green spaces and culture, offering inspiration and a model for Tokyo's future development.
