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Telecommunications Carriers Association
Location: Japan, 〒101-0052 Tokyo, Chiyoda City, Kanda Ogawamachi, 1 Chome−１０−4 興信ビルWebsite: https://www.tca.or.jp/Phone: +81 368385111
Telecom Service Association in Japan
Location: Flora Bldg. Tsukigime Parking Lot, ３-１０-2 Nihonbashiningyocho, Chuo City, Tokyo 103-0013, JapanWebsite: https://www.telesa.or.jp/Phone: 03-5644-7500
Japan Data Communications Association
Location: Yubinbango170-8585 Toshima-ku, Tokyo Sugamo chome 11th No. 1Website: Please contact administratorPhone: +81-3-5907-5139
Telecommunications Carriers Association
Location: Tokyo Sakurada Bldg 4F 1-1- 3 Nishi Shinbashi , Minato-ku Tokyo 105-0003Website: Please contact administratorPhone: +81-3 -3502- 0991
