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Otemachi One

Headquarters of Mitsui & Co. · 2-1, Otemachi 1-chome, Chiyoda-ku, Tokyo 100-8631, Japan

Two towers rising behind street trees, a striped stone facade on the left
Otemachi One from the street · © Shinkenchiku-Sha / © Mitsui Fudosan Co., Ltd. (as credited on SOM page)
Illuminated OTEMACHI ONE sign above a glass entrance at night
Entrance at night · Akichan09 / CC BY-SA 4.0 · Wikimedia Commons

In numbers

Design architect (Otemachi One)
Skidmore, Owings & Merrill (SOM)
Architect
Nikken Sekkei and Kajima Corporation
Builder
Kajima Corporation
Head-office workplace design
Nikken Sekkei (NIKKEN ACTIVITY DESIGN lab), with Interoffice + SIGNAL (CAMP and furniture)
Height
160 m (Mitsui & Co. tower); 200 m (Otemachi One Tower)
Whole development
358,687 m² (≈ 3,861,000 sq ft) on a 20,847 m² site
Developers
Mitsui & Co. and Mitsui Fudosan
Opened
May 7, 2020 (head office)
Award
65th BCS Award (2024)
Emergency
Space for 2,400 people who can't get home; 22,000 stored meals; 72 hours of generator fuel

Source: SOM project page “Otemachi One” · BCS Award, Japan Federation of Construction Contractors (65th, 2024) · Nikken Sekkei project page · Mitsui & Co. releases, Jun 8, 2016 and Mar 2, 2020. Mitsui's 2016 release gives the floor area as about 360,000 m²; the BCS page dates completion of the whole project December 6, 2022.

Questions

Where is Otemachi One?

Otemachi One is at 2-1, Otemachi 1-chome, Chiyoda-ku, Tokyo 100-8631, Japan. It is the headquarters of Mitsui & Co..

Who designed Otemachi One?

Design architect (Otemachi One): Skidmore, Owings & Merrill (SOM). Architect: Nikken Sekkei and Kajima Corporation. Head-office workplace design: Nikken Sekkei (NIKKEN ACTIVITY DESIGN lab), with Interoffice + SIGNAL (CAMP and furniture). Source: SOM project page “Otemachi One” · BCS Award, Japan Federation of Construction Contractors (65th, 2024) · Nikken Sekkei project page · Mitsui & Co. releases, Jun 8, 2016 and Mar 2, 2020. Mitsui's 2016 release gives the floor area as about 360,000 m²; the BCS page dates completion of the whole project December 6, 2022.

When did Mitsui & Co. come to Otemachi One?

2020: Into Otemachi One. On May 7, 2020 the head office moved into the MITSUI & CO. Building in Otemachi One, and the company launched “Work-X” (Workplace Experience), a new way of working for every employee.

Otemachi One in Mitsui & Co.’s history

  1. 2020
    Into Otemachi One

    On May 7, 2020 the head office moved into the MITSUI & CO. Building in Otemachi One, and the company launched “Work-X” (Workplace Experience), a new way of working for every employee.

  2. 2024
    A national building award

    Otemachi One won the 65th BCS Award, which singled out its twin towers joined at the lower floors and the four-level atrium lobby that leaves Masakado's Shrine undisturbed.

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