May 21, 2024

To whom it may concern,

Company: Tamagawa Holdings, Co., Ltd.
Representative: President, Toru Masuzawa(STANDARD Code: 6838)
Contact: Management Planning Division, Kana Yamauchi
Tel: 03-6435-6933

Notice of Participation in R&D of Flexible Waveguide Technologyfor Beyond5G(hereinafter referred to as "Tamagawa Electronics"), a subsidiary of our company, has been participating as a joint proposer in the "Research and Development of Millimet
er to Terahertz Band Flexible Waveguide Infrastructure Technology to Support Beyond
5G Communication Infrastructure" commissioned by the National Institute of Informati
on and Communications Technology (NICT, hereinafter referred to as "NICT"). We arepleased to announce that we have signed a contract with NICT.
recordOutline
Waseda University, Gifu University, Kyoto Institute of Technology, and Waveguide Te
chnology Laboratory, Inc. will conduct research and development on communications for the practical application of low-loss transmission technology using Japan's unique fl
exible waveguides for use in the frequency range of "millimeter waves to terahertz waves," which is the intermediate region between low frequency radio waves and high frequency light. The research and development will be conducted toward the practical application of low-loss transmission technology using Japan's unique flexible waveguides.
What is a flexible waveguide?
The core technology of this research and development is "flexible waveguide," a prod
uct of Japanese fiber technology. Conventionally, metal waveguides have been used for the waveguides necessary for transmission of the targeted electromagnetic waves, b
ut they are large, heavy, time-consuming to connect, and difficult to handle. The use of "flexible waveguides," which are braided from flat foil threads containing thin metallic
layers, solves the current problems of wired transmission and enables the developmen
t of peripheral technologies that take advantage of its high flexibility and light weight.
In the use of high-frequency bands such as millimeter waves to terahertz waves, it is an extremely versatile new wired transmission method with features that differ from conventional wired transmission while overcoming the shortcomings of wireless transmis
sion that are becoming increasingly apparent (instability due to the radio wave environ
ment and weak security).

3. the role of Tamagawa Electronics Co.
As one of the leading high-frequency technology expert companies in Japan, we areresponsible for communication application experiments of flexible waveguides, utilizing
our many years of experience and advanced technical capabilities.
Through this research and development, we will contribute to the establishment of aworld-leading communication infrastructure for the early practical application of terahertz frequency band communication technology, which has long been considered unex
plored, to Beyond5G (6G).

Flexible waveguide

Courtesy of Yonezawa Bussan Co.

Results of the FY2024 Open Call for New Contract Research Proposals under the "Elemental Technology and Seeds Creation Type Program: General Proposals" of the "Innov
ative Information and Communications Technology (Beyond 5G (6G)) Fund Project"].
https://www.nict.go.jp/publicity/topics/2024/02/26-2.html... and upwards