Offices—from the 5th to 36th floors—provide a total working space of some 96,000m². Standard leasable space on each floor is about 3,000m² and features expansive pillar-free spaces. Floor-to-ceiling windows ensure naturally lighted open-air spaces and support flexible office layouts to accommodate diverse working arrangements. Special areas are provided on each floor for the storage of supplies in case of a natural disaster or other emergency.
An underground pedestrian walkway connects the Tower directly to the Toranomon Hills Station on the Hibiya Subway Line and the existing Toranomon Station on the Ginza Subway Line. A bus terminal on the first floor is the departure and arrival point for airport limousine buses and the Bus Rapid Transit service connecting central Tokyo and waterfront area. In addition, once Loop Road No. 2 running under Toranomon Hills is fully opened, it will be possible to reach Haneda Airport by road in 25 minutes. Such convenience is ideal for global companies.
All leasable space has already been leased to Japanese and foreign companies representing a wide range of industries. With the launch of Toranomon Hills Business Tower, the total office area of the Toranomon Hills complex has expanded to approximately 195,000m².

The 3,800m² ARCH incubation center on the fourth floor is a new business-creation base in the Toranomon Hills, designed to serve as global business center.
Its facilities include meeting rooms, co-working spaces, a training room, cafe and lounge. U.S. Silicon Valley-based venture capital firm WiL, which supports large enterprises in new business creation as well as nourishing and investing in venture companies, helped to plan the facility and participating in its ongoing operation.
The center offers a range of support services, including various sector know-how, educational programs and enlightenment events. In addition, consultants experienced in creating new business opportunities at large enterprises help facilitate collaboration between resident companies with the aim of supporting new business development.
The incubation center is aimed at becoming a key base for Japan's unique innovation ecosystem. In particular, it enables residents to leverage the abundant resources of established large enterprises, including their human resources, goods, capital and know-how. It also supports initiatives for internal business reforms as well as new business creation.
By linking with various international networks, ARCH is destined to become a bridge between diverse industries and enable innovation originating in Tokyo to permeate throughout Japan and overseas.

From the first basement floor to the third floor, 59 retail facilities occupying a total area of some 7,600m² offer food, beverages and other products and services to support global player’s lifestyles. The first basement floor features an area’s first upscale supermarket and casual restaurants. The first ground floor is populated with stores selling Japanese sweets, candies and wines suitable as Toranomon Hills gourmet souvenirs. The second floor hosts retailers selling everyday fashion items and miscellaneous goods. The third floor, in addition a wide range of restaurants for lunch and dinner, is the home of Toranomon Yokocho, a landmark dining area featuring a rich variety of famous restaurants from throughout Tokyo.

On the first floor, a bus terminal measuring some 1,000m² is directly accessible on foot to Toranomon Hills Station on the Hibiya Subway Line and Toranomon Station on the Ginza Subway Line. The terminal is the departure and arrival point for airport limousine buses and the Bus Rapid Transit service connecting the city center and waterfront area. On the second floor, a pedestrian deck connects the Business Tower and Toranomon Hills Mori Tower. Together with Shintora-dori Avenue integrated with Loop Road No. 2, the pedestrian network connects the entire Toranomon Hills. In addition, when Loop Road No. 2 is fully opened it will provide extra-easy access to Haneda Airport, further cementing Toranomon Hills as the newest “Gateway to Tokyo” connecting central Tokyo with the world.

The Business Tower’s exterior design was created by German architect Christoph Ingenhoven (ingenhoven associates). The building is harmonized with the existing Toranomon Hills Mori Tower and serves as an international business hub. The retail facilities and ARCH incubation center, designed by Masamichi Katayama (principal of Wonderwall inc.), are highly modern and yet reflect the history and traditions of Toranomon.
Public art works by three globally noted Asian contemporary artists are displayed at office entrances and additional venues.