Office profile
NTT Headquarters & offices · Tokyo, Japan
NTT · Tokyo, Japan
NTT runs from a twin tower in Otemachi, and in 2031 plans to move back to Hibiya, where its head office first opened in 1961, into a 48-storey tower.
The Otemachi headquarters, the leave and remote-work rules, and seven decades of head-office moves, followed by the business. Every number comes from NTT's own website, press releases, sustainability pages and filings.
- 143,207 m²Otemachi First Square, both towers
- 62.2%of employees working remotely, FY2025
- 20 dayspaid annual leave a year
- 344,196employees in the group, March 2026
Sources: NTT Corporate Data · NTT Urban Development, Otemachi First Square · NTT Sustainability: Diverse Work Styles · Press release, Dec 8, 2025
Companies / Japan / Telecommunications / NTT
THE HEAD OFFICE TODAY · OTEMACHI FIRST SQUARE · EAST TOWER
A twin tower at the corner of Hibiya-dori and Eitai-dori
NTT's head office is in the East Tower of Otemachi First Square, the only twin-tower office building in the Otemachi area. The building's own site describes an atrium entrance and a sunken garden, shops and restaurants on the lower floors, and a direct link to Otemachi Station. Office floors have 2.7 m ceilings and about 1,626 m² each in the East Tower.
- 23 floors + 5 basements, twin towers
- 143,207 m² (≈ 1,541,466 sq ft) in all
- West Tower 1992 · East Tower 1997
- Direct link to Otemachi Station
- Design: NTT Urban Development + NTT architecture dept.
Atrium, gardens and lobby
The building's own site describes an atrium entrance and a sunken garden, with shops and restaurants on the lower floors and a direct link to Otemachi Station.
The twin towers
The West Tower was completed in 1992 and the East Tower, NTT's head office, in 1997; the two have 23 floors above ground and 143,207 m² in all.
Facts: Otemachi First Square official site (About) · NTT Urban Development property page · Shinkenchiku 1992:04 project data · NTT Corporate Data
The head office and the buildings around it
| Building | Address |
|---|---|
| Head office · Otemachi First Square, East Tower | 5-1, Otemachi 1-Chome, Chiyoda-ku, Tokyo 100-8116, Japan |
| NTT Hibiya Tower (planned head office, 2031) | 1-1-10 Uchisaiwaicho, Chiyoda-ku, Tokyo (lot number) |
Source: NTT Access page · Press release “Hibiya ‘City of Light’”, Dec 8, 2025 · See them on the map ↓
Source: Otemachi First Square official site (About) · NTT Urban Development property page · Shinkenchiku 1992:04 project data. The building is shared: its owners include NTT EAST, Tokio Marine & Nichido and NTT Urban Development.
Benefits (Japan, major NTT Group companies)
For any purpose, every year after one full year of service (13 days in the first year).
Up to 3 expiring annual-leave days a year can be banked, plus 5 extra days every 5 years of service; usable for any reason.
Wedding (5 days), bereavement (up to 10 days), summer vacation (3 days) and more.
Any employee can take leave to look after a child under three; Japanese law requires up to age two.
Until the child finishes third grade of elementary school, with shift work and limits on overtime.
Up to 18 months in total for a family member who needs care (the legal minimum is 93 days).
Infertility treatment support leave, introduced in July 2024.
Paid leave for illness or injury, for three months to two years depending on the condition.
Source: NTT Sustainability — Diverse Work Styles · NTT D&I “Systems” page (group.ntt/jp/diversity/system.html). Applies to full-time employees of major Group companies; company housing and housing allowances are also listed, without amounts.
Why people stay: what NTT itself says
In Remote Standard teams, home can be anywhere in Japan; trips to the office are paid as business travel. Solo job transfers fell by about 1,700 from 4,900.
Share of employees doing remote work at the end of fiscal 2025.
About 1,500 applications to the NTT Group Job Board from April 2024 to March 2025; nearly 800 people got the new job.
No core hours, split shifts allowed, and since July 2024 work can start as early as 5 a.m. for any reason.
Employees can spend part of their hours on work for another department while keeping their own role.
Male childcare-leave rate in fiscal 2025 (legal formula), against a 100% target.
Source: NTT Sustainability — Diverse Work Styles, Autonomous Career Formation, Diversity & Inclusion (group.ntt/en/sustainability/social/)
Who works here
employees, consolidated (March 31, 2026)
of managers are women (FY2025)
of hires are mid-career (FY2025)
R&D staff (March 2025)
Source: NTT Corporate Data · NTT at a Glance · NTT Sustainability — Diversity & Inclusion (female employee ratio, reference figure)
Compare NTT with: Comcast · Orange · AT&T
Office history: Hibiya, Shinjuku, Otemachi — and back to Hibiya
- 1952 A public corporation for the telephone
Nippon Telegraph and Telephone Public Corporation (“Dendenkosha”) was set up on August 1, 1952 to spread telephone service across Japan. It bought land in Hibiya in 1951, the year before, to build its head office.
Source: NTT at a Glance (History) · NTT FACILITIES, “Former Hibiya Denden Building Archives”
No free-to-use photo found yet.Have one? We’d love to add it. - 1961 Hibiya Denden Building, Uchisaiwaicho 1-chome
The head office moved into a new nine-storey building beside Hibiya Park, completed in January 1961: 75,489 m² (≈ 812,556 sq ft), with 6,000 m² floors, glass walls, wide balconies and full air conditioning, a first for Dendenkosha's offices. It was designed by Hideo Kunikata and won the Architectural Institute of Japan Prize.
Source: NTT FACILITIES, “Former Hibiya Denden Building Archives” · NTT press release, Dec 8, 2025
Hibiya Denden Building, Uchisaiwaicho 1-chome, Tokyo, 2006 · Lombroso / Public domain · Wikimedia Commons - 1985 Privatized as NTT, still in Hibiya
Under the NTT Act, the public corporation became Nippon Telegraph and Telephone Corporation on April 1, 1985. The Hibiya building remained the head office until 1996, 24 years as Dendenkosha's head office and then NTT's.
Source: NTT Corporate Data · NTT FACILITIES, “Former Hibiya Denden Building Archives”
No free-to-use photo found yet.Have one? We’d love to add it. - 1996 NTT Shinjuku Headquarters, 3-19-2 Nishi-Shinjuku
A 30-storey tower by Cesar Pelli & Yamashita Associated Architects, completed in 1995 with 84,781 m² (≈ 912,577 sq ft). The fan-shaped tower was planned so its offices look out toward central Shinjuku and the Imperial Palace. The head office moved here in 1996, and the 1998 annual report gives it as NTT's address.
Source: Jun Mitsui & Associates / Pelli Clarke & Partners Japan project page · NTT FACILITIES archives · Form 20-F, 1998
NTT Shinjuku Headquarters (today NTT East's head office) · Akonnchiroll / CC BY-SA 4.0 · Wikimedia Commons - 1999 Holding company in Otemachi: 3-1 Otemachi 2-chome
NTT became a holding company in July 1999, with NTT EAST, NTT WEST and NTT Communications as new subsidiaries. Its annual reports from 1999 give the head office as 3-1, Otemachi 2-chome, Chiyoda-ku.
Source: NTT Group history · Form 20-F, 1999 and 2001
No free-to-use photo found yet.Have one? We’d love to add it. - 2013 Otemachi First Square, East Tower
On December 24, 2013, NTT moved its head office from the “Tsushin Building” in Otemachi to the East Tower of Otemachi First Square, its address today.
Source: NTT notice “Relocation of head office”, Oct 28, 2013 (search-result excerpt) · NTT Access page
No free-to-use photo found yet.Have one? We’d love to add it. - 2025 Renamed NTT, Inc.
From July 1, 2025 the company's official name became NTT, Inc., the name it was already known by in Japan and abroad, with a renewed corporate identity.
Source: NTT press releases, May 9, 2025
No free-to-use photo found yet.Have one? We’d love to add it. - 2031 Planned: back to Hibiya, NTT Hibiya Tower
NTT plans to move its head office into NTT Hibiya Tower, a 48-storey, ≈ 230 m tower of about 361,000 m² (≈ 3,885,768 sq ft) on the Uchisaiwaicho 1-chome block, due for completion at the end of October 2031. The offices are to be ZEB Ready, and a large atrium (“Cross Gate”) will connect to Hibiya Park.
Source: NTT / NTT Urban Solutions / NTT Urban Development press release, Dec 8, 2025
No free-to-use photo found yet.Have one? We’d love to add it.
Map: how the headquarters moved
Sixty-five years within a few kilometres of central Tokyo: from beside Hibiya Park to a Shinjuku tower, then to Otemachi. The tower planned for 2031 is back on the Hibiya block.
- 1 · 1961Hibiya Denden Building, Uchisaiwaicho 1-chome — Head office of Dendenkosha, then NTT, until 1996
- 2 · 1996NTT Shinjuku Headquarters, 3-19-2 Nishi-Shinjuku — Cesar Pelli tower, completed 1995
- 3 · 19993-1 Otemachi 2-chome, Chiyoda-ku — Head office of the new holding company
- 4 · 2013Otemachi First Square, East Tower, 1-5-1 Otemachi — Head office today
Addresses: NTT FACILITIES archives · JMA project page · Form 20-F (1998, 1999, 2001) · NTT Access page
What NTT does
NTT began as Nippon Telegraph and Telephone Public Corporation in 1952 and was privatized in 1985. Today it is a holding company for mobile (NTT DOCOMO), global IT services (NTT DATA), regional phone and fiber networks (NTT EAST and WEST), real estate and energy. It also runs its own R&D labs.
Four segments: Integrated ICT, Global Solutions, Regional Communications, and Others (real estate, energy and others).
Where the money came from · Operating revenues by segment, FY2025 (incl. intersegment)
Source: NTT IR — Financial Highlights (Information by Segment), FY2025 = year ended March 31, 2026 · NTT at a Glance
Source: NTT IR — Financial Highlights (xlsx, FY2017–FY2025, IFRS) · NTT at a Glance · growth rate calculated by eciffo
Growth: revenue vs. people
¥11.78T → ¥14.41T
in 1,026 consolidated subsidiaries
Fiscal years end March 31 (FY2025 = year ended March 31, 2026). Operating revenues (IFRS): NTT IR Financial Highlights, FY2017–FY2025. Employees: NTT Corporate Data. Multiple calculated by eciffo.
Chief executives
President and CEO since June 2022. Joined Nippon Telegraph and Telephone Public Corporation in 1981 and worked in corporate strategy, finance, and general affairs and personnel at NTT, NTT WEST and NTT EAST.
President and CEO from June 2018; Chairman since June 2022. Joined the public corporation in 1978.
President and CEO when the head office moved to Otemachi First Square in 2013.
Founded on April 1, 1985 under the NTT Act, succeeding Nippon Telegraph and Telephone Public Corporation (established August 1, 1952).
Source: NTT Profiles (Akira Shimada, Jun Sawada) · Corporate Data · Head office relocation notice, Oct 2013
NTT: questions people ask
Where is NTT's headquarters?
In the East Tower of Otemachi First Square, 5-1 Otemachi 1-chome, Chiyoda-ku, Tokyo, connected directly to Otemachi Station (exits C8, C11 and C12) and about five minutes' walk from Tokyo Station.
Source: NTT Access page · Corporate Data
Is NTT moving its headquarters?
Yes, it plans to. NTT announced in December 2025 that it will move its head office to NTT Hibiya Tower, a 48-storey tower in Uchisaiwaicho due for completion at the end of October 2031, close to where Dendenkosha set up its head office in 1961.
Source: Press release, Dec 8, 2025
How big is Otemachi First Square?
The twin towers have 143,206.98 m² (≈ 1,541,466 sq ft) of floor space, 23 floors above ground and 5 below. NTT's head office is in the East Tower, which has floors of about 1,626 m².
Source: Otemachi First Square official site · NTT Urban Development
Who designed NTT's headquarters?
Otemachi First Square was designed by NTT Urban Development with NTT's architecture department. The earlier Shinjuku head office (1995) was by Cesar Pelli & Yamashita Associated Architects, and the 1961 Hibiya building by Hideo Kunikata.
Source: Shinkenchiku 1992:04 · JMA project page · NTT FACILITIES archives
How many people work at NTT?
344,196 employees on a consolidated basis as of March 31, 2026, across 1,026 consolidated subsidiaries.
Source: NTT Corporate Data · NTT at a Glance
Can NTT employees work remotely?
Yes. NTT Group has remote work, satellite offices, Super Flextime and a “Remote Standard” system under which employees in eligible teams can live anywhere in Japan. 62.2% of employees were doing remote work at the end of fiscal 2025.
Source: NTT Sustainability — Diverse Work Styles
How much paid leave do NTT employees get?
20 days of paid annual leave a year after one year of service (13 in the first year), plus paid special leave, and up to 40 days of banked “life plan leave” usable for any reason.
Source: NTT Sustainability — Diverse Work Styles
What childcare support does NTT offer?
Childcare leave until a child turns three, shorter hours (4, 5 or 6 hours) until the end of third grade, and limits on overtime. The male childcare-leave rate was 125.5% in fiscal 2025.
Source: NTT Sustainability — Diverse Work Styles, Diversity & Inclusion
Who is NTT's CEO?
Akira Shimada, President and CEO since June 2022. Jun Sawada, CEO from 2018 to 2022, is Chairman.
Source: NTT Profiles
When was NTT renamed NTT, Inc.?
On July 1, 2025. Its former name was Nippon Telegraph and Telephone Corporation.
Source: NTT press releases, May 9, 2025
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