• Introduction to Our Facilities
  • Services
  • Earthquake Early Warning System

Introduction to Our Facilities

“Building for the future while preserving and resurrecting history”
A landmark that aims for harmony between people and the urban environment

Nihonbashi Mitsui Tower is a skyscraper that symbolizes urban rejuvenation. The structure was built with the concept of passing on the historical and cultural heritage of the original Mitsui Honkan that was completed in 1929 (and designated an important cultural property in 1998), while being a part of the redevelopment of Nihonbashi. The new structure is a premium office building that harmonizes tradition and the spirit of innovation. At the same time, it provides the district with a sense of openness. It is one of the landmarks of Nihonbashi where people and the urban environment can coexist together.

Nihonbashi Mitsui Tower

Location 2-1-1 Nihonbashi-Muromachi, Chuo-ku, Tokyo
Floors 39 floors and 4 basement floors
Height 194.69m
Site area 14,375.28m2
Gross floor area 133,855.68m2
Completion July 2005

Opening time

Opening time of Main entrance.

7:00 to 0:30 every day


Shops & Restaurants
Nihonbashi Mitsui Tower B1F to 2F

Nihonbashi Mitsui Tower meets the needs of office workers, visitors to the building and visitors to the district with facilities from convenience stores and ATMS useful in daily life to lunch and dinner spots.

Click here to see a list of the shops & restaurants

Office Floors
Nihonbashi Mitsui Tower 5F to 28F

Nihonbashi Mitsui Tower provides an intelligent office space that possesses the most advanced facilities to help with efficient operations.

Art Gallery
Mitsui Honkan 7F

Mitsui Memorial Museum is an art gallery that opened in October 2005. This museum brings together works of art covering the history of the Mitsui Family which extends over 300 years from the Edo Period (1603-1868). This is one of the most valuable collections of cultural heritage in Japan which has been handed down to the present times. The Mitsui Honkan building, where the Mitsui Memorial Museum is housed, has been designated as an important cultural property of Japan for its profound Western-style architecture that represents the Japan of the early Showa Era (1926-1989). An entrance to the museum has been established in the atrium of the Nihonbashi Mitsui Tower skyscraper which has been built adjacent.

Hotel (Mandarin Oriental Tokyo)
Nihonbashi Mitsui Tower 3F and 30F to 38F

The Mandarin Oriental Tokyo is a hotel of the highest grade which has won numerous prestigious awards, including being designated as the world's first “5 star” venue. This is a supreme space that exudes the traditions and elegance of Japan in style. Please enjoy spending quality time in the guest rooms & suites which provide a large panorama of breathtaking Tokyo, the restaurants & bars which offer artistic gourmet food or the spa in the sky which attracts celebrities from all over the world.

Nihonbashi Mitsui Tower 1F

This atrium with a height of about 26m that extends to the fourth floor of the building is a huge space full of light where you can feel a solemn atmosphere.


Haru Sculptures
Nihonbashi Mitsui Tower 1F

There is a display of works by Satoshi Saito in the first floor atrium.

Stained Glass
Nihonbashi Mitsui Tower Atrium Ceiling

This stained glass was installed in the atrium top light of the old Mitsui Building No.2 (designed by Tamisuke Yokogawa and completed in 1912), so after some repairs we have restored the stained glass stored during demolition in accordance with the construction of Nihonbashi Mitsui Tower.

Historical Wall
Nihonbashi Mitsui Tower Atrium

The Historical Wall is an etched glass screen which serves as the design of the south side exterior wall of the Mitsui Honkan. This acts as one the preservation applications of the Mitsui Honkan. It also expresses the continuity of the exterior wall of the Mitsui Honkan.


Information Counter

Information Counter

Location Nihonbashi Mitsui Tower 1F
Opening hours Weekdays - 9:00 to 19:00 / Weekends and holidays - 9:00 to 17:00


Sumitomo Mitsui Banking Corporation

Sumitomo Mitsui Banking Corporation
(Mitsui Honkan 1F)

Sumitomo Mitsui Trust Bank

Sumitomo Mitsui Trust Bank
(Mitsui Honkan 1F)

Persons with Disabilities

Location of wheelchairs

We have wheelchairs available which can be used in the building. If you wish to use a wheelchair, please inform either the Information Counter on the first floor or the nearest security guard.

Ostomate-accessible Toilet

Ostomate-accessible toilet locations

There is an ostomate-accessible multipurpose toilet available for use on the second floor.

Assistance Dogs

Assistance dogs are allowed inside the building.

Automated External Defibrillator (AED)

There is an AED available inside the building which will be operated by the security guards in the event of an emergency.

Earthquake Early Warning System

An earthquake early warning system has been installed for the safety and security of workers and visitors. In conjunction with the server of the Japan Meteorological Agency, earthquake early warnings will be broadcast in real time in the building in the event an earthquake of level 4 or above is sensed.

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