Toranomon Hills Business Tower

A 36-story, 185-metre supertall completed in January 2020 as the second tower in the Toranomon Hills complex. Directly connected to the new Toranomon Hills Metro station, it houses the ARCH innovation hub alongside some 96,000 square metres of office space.

Use

Office tower

Area

Minato City

Completed

2020

Floors

36 above ground, 3 below

Height

185 m

Total floor area

approx. 172,925 m²

Developer

Toranomon 1-chome District Urban Redevelopment Association (Mori Building)

Architect

Mori Building (design); Exterior design: Christoph Ingenhoven

Toranomon’s Second Act

In January 2020, a 36-story tower completed on the south side of the Toranomon Hills site. The Business Tower stands approximately 185 metres tall, with a total floor area of around 172,925 square metres, and marks the second phase of the Mori Building–led redevelopment that began with Toranomon Hills Mori Tower in 2014. Its completion coincided with the opening of Toranomon Hills Station — a new stop on the Tokyo Metro Hibiya Line that connects directly to the tower’s basement. A new station appearing in an already-dense urban core is unusual, and it immediately raised the profile of the district.

Design was handled by Mori Building, with German architect Christoph Ingenhoven responsible for the exterior. Ingenhoven is known for his “green tech” approach — drawing natural light and ventilation into buildings — and those principles are visible in the tower’s facade. The lower floors (basement to third floor) host approximately 7,600 square metres of commercial space; the fourth floor is occupied by ARCH, a roughly 3,800-square-metre incubation centre aimed at co-creation between large corporations and startups. Floors five through thirty-six are office space, with a total leasable area of approximately 96,000 square metres.

Four Towers Complete a District

The Business Tower was not the end of the story. Toranomon Hills Residential Tower followed in 2022, and the 49-story Station Tower was completed in 2023, bringing the complex to four buildings and transforming a previously underdeveloped stretch between Kasumigaseki and Roppongi into one of Tokyo’s most prominent international business addresses.

Pedestrian infrastructure improved in step. The Kanjo Route 2 expressway extension and new street-level connections made the area easier to navigate. From Toranomon Hills Station, an underground path leads through the Business Tower’s lower floors to the Mori Tower’s deck, from which the government buildings of Kasumigaseki are visible to the north and the hills of Roppongi to the south — a useful reminder of where exactly in the city this district sits.

Summary

Toranomon Hills Business Tower was completed in January 2020 with 36 floors and a height of approximately 185 metres. Its underground connection to a purpose-built Metro station, combined with Christoph Ingenhoven’s exterior design and the innovation-focused ARCH centre, made it a notable addition to the Toranomon Hills complex. With all four towers now in place, the district has become a distinctly new layer in the urban fabric that links Kasumigaseki to the rest of central Tokyo — worth a walk through to see how it fits.

Related: Toranomon Hills Mori Tower / Toranomon Hills Station Tower

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