NTT Group

― 1950s ―

Pocket Bell (Wireless Calling Service) was born in the United States. The name is "Bellboy Service."

A Pocket Bell outsourcing company was established in Japan, and Pocket Bell service began in the 23 wards of Tokyo.

The pager becomes widespread and is widely used among salespeople and young people.

The Tomei Expressway is fully opened.

― 1970s ―

The Japan Expo '70 (Osaka Expo) is held.

Fax service begins.

New Tokyo International Airport (Narita Airport) opens.

The Nikkei Stock Average surpasses 10,000 yen.

Japan's telegraph and telephone public corporation is privatized and becomes NTT, the Nippon Telegraph and Telephone Corporation.

NTT launches a handheld mobile phone and begins mobile phone service.

The world's first ISDN (Integrated Services Digital Network) service, "INS Network 64," is launched in Tokyo, Nagoya, and Osaka.

NTT Data is established.

The mobile phone "mova" is born and becomes a hit as the smallest and lightest mobile phone in the world.

The WWW (World Wide Web) appears.

NTT separates and becomes independent from the Mobile Communications Division as NTT Mobile Communications Network Inc.

NTT Docomo is established.

PHS (Personal Handy Phone System) appears.

The Great Hanshin-Awaji Earthquake occurs.

Internet connection service "OCN" begins.

i-mode service begins.

The NTT Group transitions to a holding company system, and NTT East, NTT West, and NTT Communications are established.

On February 22, 1999, only the mova 501i model supported i-mode service. The i-menu had 68 sites, mainly news and weather content.

NTT East Japan and NTT West Japan launched FTTH (Fiber To The Home), a fiber optic communication service for general households, as B-Fletz service in this year.

A flat-rate service using optical fiber to connect to the internet at high speed was fully launched on August 1, 2001 (initially up to 100M, 9,000 yen per month).

Start of terrestrial digital broadcasting

Japan's first magnetic levitation linear motor car (Aichi Rapid Transit Eastern Hills Line) opened for service.

Start of

Cloud service launch

Acquisition of Dimension Data and Keane (now NTT DATA, Inc.)

― 2011s ―

Great East Japan Earthquake

Full opening of Kyushu Shinkansen Kagoshima route

Tokyo Skytree opening

To accelerate initiatives under the medium-term management strategy "Aiming for a New Stage," formulated and announced in May 2015, the "Aiming for a New Stage 2.0" strategy was developed and announced.

Announcement of medium-term management strategy "Aiming for a New Stage 2.0"

Photo: PoC in NTT R&D Forum 2015

Announcement of medium-term management strategy "Your Value Partner"

Publication of "IOWN (Innovative Optical and Wireless Network) Concept" Proposed as a future communication infrastructure that surpasses the limits of existing infrastructure through innovative technologies centered on light, aiming to realize a rich society that can accept diversity. NTT, Intel Corporation, and Sony Corporation have announced the establishment of the "IOWN Global Forum," an international initiative to promote research and development of IOWN in collaboration with global partners.

Announcement of new environmental energy vision "NTT Green Innovation toward 2040" Amid increasing severity of environmental issues such as climate change, a new environmental energy vision "NTT Green Innovation toward 2040" was formulated to achieve zero environmental impact and economic growth through "reducing environmental burden in business activities" and "creating innovation that breaks limits." By 2030, aim to reduce greenhouse gas emissions by 80% (compared to 2013 levels) and achieve carbon neutrality in mobile (NTT Docomo) and data centers, with the goal of achieving carbon neutrality across the NTT Group by 2040. Establishment of "NTT Group Sustainability Charter" The NTT Group believes that realizing a society that encompasses conflicting concepts and phenomena, recognizing diverse values, leads to a sustainable society. Based on the idea of "Self as We," which supports all entities including people, things, and technology, a global "NTT Group Sustainability Charter" was established to simultaneously achieve corporate growth and solve social issues.

NTT Docomo acquires NTT Communications and NTT Comware as subsidiaries The three companies' functions were integrated, creating a new Docomo Group expanding from mobile to service and solution domains.

Start of service for APN IOWN 1.0 As the first commercial service toward realizing the IOWN concept, the All-Photonics Network (APN) IOWN 1.0, which uses wavelength division multiplexing across the entire communication network, was launched. Announcement of medium-term management strategy "New value creation & Sustainability 2027 powered by IOWN" NTT commits to continuous challenge, aiming to create new value and contribute to Earth's sustainability. The plan involves approximately 8 trillion yen of new investments in growth areas over five years, strengthening cash generation, and increasing EBITDA to 4 trillion yen by FY2027, a 20% increase over FY2022. The new strategy is based on three pillars: 1. "Creating new value and supporting a globally sustainable society" through IOWN, data-driven innovation, and realizing a circular society. 2. Enhancing "Customer Experience (CX)" and "Employee Experience (EX)" to support these pillars.

August 24, 2026: Unraveling the mind and intelligence, introducing the future created by humans and AI "NTT Communication Science Laboratory Open House 2026"

[Report] Children's workshop event "NTT Dream Kids 2026" where you can experience future technology Mirai School