TTC 40th Anniversary

40 Years of Advancing with the Power of Standardization to Shape the Future of ICT
With heartfelt gratitude for your continued support, we remain committed to taking on new challenges for the next era.

 

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Greetings

This year marks the 40th anniversary of TTC, established on October 25, 1985, as part of the telecommunications liberalization policy implemented in the same year.

Since its founding, TTC has worked to promote standardization in the field of information and communication technologies (ICT), contributing significantly to the development of the industry. We would like to express our heartfelt gratitude for the generous support and cooperation we have received from so many individuals and organizations over the years.

The year 1985 also saw the opening of the Tsukuba Science Expo. 
At the Expo, visitors experienced the Information Network System (INS), which used optical fiber to connect the venue with locations across the country, enabling high-definition television broadcasts and more.

The theme of the 2025 Osaka-Kansai Expo, now being held, is “Designing Future Society for Our Lives.
Over the past 40 years, technologies in the ICT field—such as the internet and mobile communications—have rapidly advanced. As a result, the focus of ICT standardization has transited from ensuring network interconnectivity, quality, and safety, to enabling ICT to address social challenges and contribute to the realization of a vibrant future society, as highlighted in the theme of this year’s Expo.

In a time of rapid and diverse changes, TTC, as Japan’s national standards body for ICT, must continue to respond flexibly. As ICT enhances the convenience of our daily lives, collaboration across different industries becomes increasingly essential. Promoting cross-industry standardization requires close cooperation with industry-specific standardization organizations.To this end, TTC will actively pursue partnerships with such organizations by organizing seminars, workshops, and other collaborative forums.

We remain committed to contributing to the standardization of ICT infrastructure that supports future society.

The Telecommunications Technology Committee (TTC)
President, Director-General
Hideyuki IWATA

Congratulatory Messages from Standardization Organizations

On the occasion of our 40th anniversary, we have received warm congratulatory messages from standardization organizations both in Japan and abroad. We extend our heartfelt appreciation for their kind words and continued support.

動画を見る

A Short Video Featuring “Congratulations!” from Around the World
(The full versions of each message are available on their respective pages.)

Click on each logo to view the message from that organization.

Our 40-Year Journey

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Summary of Activities and Achievements

As of the end of May 2025

Standards-related Documents

 

Yearly Revision Status of Standards-related Documents

 

 

Top 10 Most Downloaded Standards-related Documents in Fiscal Year 2024

Ranking Document
Number
Date of
latest edition
Working
Group
Title Number of
downloads
1

 JJ-90.30

16 May 2024
Signalling
Common interconnection interface between IMS operator's networks
2626
2
TS-1023
6 June 2024
Enterprise Network
Common Interface Specification between Digital radio communication system and Command system for fire and ambulance service
2521
3
JT-X1060
11 April 2022
Security
Framework for the creation and operation of a cyber defence centre
2076
4
JT-T30
29 May 2008
Multimedia Application 
Procedures for Document Facsimile Transmission In the GSTN
1921
5
JT-G652
24 May 2018
Network Management 
Characteristics of a single-mode optical fibre and cable
1509
6
JJ-300.10
16 May 2024
IoT Area Network
Home network Communication Interface for ECHONET Lite and IoT applications (IEEE802.15.4/4e/4g 920MHz-band Wireless)
1457
7
JT-Y1731
11 November 2021
Transport Networks and EMC
OAM functions and mechanisms for Ethernet based networks
1368
8
JT-G709
1 March 2011
Transport Networks and EMC
Interfaces for the Optical Transport Network (OTN)
1171
9
JS-CISPR-35
21 May 2020
Transport Networks and EMC
Electromagnetic compatibility of multimedia equipment Immunity requirements
967
10
JJ-21.10
28 April 1989
Enterprise Network
Analog Interface for PBX and Key Telephone Terminal Equipments (SR-Signalling System)
937

 

Seminars Held in Fiscal Year 2025

Date Title
1 August 2025 TTC Seminar: "The possibilities of NTN connected to the future ~To a safe world resilient to natural disasters~"
25 July 2025 TTC Seminar: "Emerging Standards and Technologies in Multimedia Accessibility – 2025"
18 July 2025
TTC Seminar: "Safe Listening 5:I hope I can always enjoy good sound"
16 June 2025
TTC Seminar: "Distributed Optical Fiber Sensing Technology Supporting Communication Networks and Social Infrastructure"
23 May 2025
TAICS-TTC Collaborative workshop on Next-Generation Communications Industry Technology - IOWN & 5G O-RAN Technology Trends
24 April 2025
TTC Seminar: "Latest Developments in FRAND Litigation and Implications for SEP Strategy"