Nippon Telegraph and Telephone Corporation (NTT)
 Japan Post Co., Ltd.
 NTT DOCOMO, INC.
 NTT East Corporation
 NTT Communications Corporation
 NTT Comware Corporation
 CONEXIO Corporation
 Panasonic Co., Ltd.
 Socionext Inc.
 Nuvoton Technology Corporation Japan
 FUJIFILM Business Innovation Corp.
 Tokyo Electron Ltd.
 Tokyo Electron Device Ltd.
 Continental Automotive Japan K.K.
 Axis Communications AB
 Zuken, Inc.
 Napson Corporation
 Nihon University
 The University of Tokyo
 Tohoku University
 Hitotsubashi University
 Ministry of Internal Affairs and Communications (MIC)
 The Telecommunications Association of Japan
 NHK International, Inc.
 KDDI Foundation
 Japan Telecommunications Engineering and Consulting Service
 Tsushinbunka Association
 Japan Air Mail Co., Ltd.
 The Tsushin-Bunka Shinpou

                                  and more