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Research by Country/Region January 17, 2018  
Additional Key Telecom Contacts in Japan

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Additional Key Telecom Contacts in Japan
As of 10/24/08

NTT (Holding Company)
International Procurement Office
3-1, Ootemachi 2-Chome
Chiyoda-ku, Tokyo 100-8116
Phone: +81-3-5205-5285
Fax: +81-3-5205-5289
Procurement Information Web Site:

Association of Radio Industries and Businesses (ARIB)
Nittochi Bldg. 14F, 1-4-1, Kasumigaseki
Chiyoda-ku, Tokyo 100-0013
TEL: 81-3-5510-8590 FAX: 81-3-3592-1103

Telecommunications Carriers Association (TCA)
Address: Tokyo Sakurada Bldg., 4F, 1-1-3 Nishi-shinbashi
Minato-ku, Tokyo 105
Phone: 81-3-3502-0991: Fax: 81-3-3502-0992

TCA is a trade association of telecom carriers in Japan, including both wireline and wireless telecommunications carriers, with members from approximately 100 companies. TCA is a useful organization for U.S. companies to obtain publicly available statistics. The association publicizes an annual report. An English edition is also available.

Communications and Information Network Association of Japan (CIAJ)
JEI Hamamatsucho Bldg., 3rd Fl., 2-2-12 Hamamatsucho
Minato-ku, Tokyo 105-0013
Phone: 81-3-5403-9363; Fax: 81-3-5463-9360

Note: CIAJ is a trade association of telecommunications equipment suppliers and has approximately 300 member companies. CIAJ assists U.S. telecommunications vendors in forming corporate alliances for OEM and distribution arrangements.

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