| Yomiuri telecasting corp. |
| Japan Cable and Telecommunication Association |
| NIPPON TELEGRAPH AND TELEPHONE WEST CORPORATION |
| Espial Group Inc. |
| TELEVISION OSAKA, INC. |
| Vewd Software Japan GK |
| DATABROAD CORPORATION |
| HISENSE JAPAN CORPORATION |
| Nagoya Broadcasting Network Co.,Ltd. |
| TBS GLOWDIA, Inc. |
| WOWOW Inc. |
| MITSUMI ELECTRIC CO.,LTD. |
| NHK ENTERPRISES, INC. |
| Mitsubishi Electric Corporation |
| KANSAI TELECASTING CORPORATION |
| NHK Engineering System, Inc. |
| Mitsubishi Research Institute, Inc. |
| Asahi Broadcasting Corporation |
| Meitetsucom Co., Ltd. |
| Forecast Communications Inc |
| SAMSUNG R&D INSTITUTE JAPAN CO.LTD. |
| Internet Initiative Japan Inc. |
| I-O DATA DEVICE, Inc. |
| Japan Digital Serve Corporation |
| NHK Technologies,Inc. |
| TOKYO METROPOLITAN TELEVISION BROADCASTING |
| Hokkaido Television Broadcasting Co., Ltd. |
| HokurikuDenwaKouji Co.,Ltd. |
| Minaminihon Broadcasting Co.,Ltd |
| Fujisoft Incorporated |
| FUJIMIC,Inc. |
| Dolby Japan K.K. |
| Mainichi Broadcasting System,Inc. |
| Hakuhodo DY Media Partners Inc. |
| Technicolor Japan K.K. |
| NTT Communications Corporation |
| Kunai, Inc. |
| NEC Corporation |
| Actvila Corporation |
| World Hi-Vision Channel, Inc. |
| Sumitomo Electric Industries, Ltd. |
| LG Japan Lab Inc. |
| Fujitsu Limited |
| NIPPON TELEGRAPH AND TELEPHONE EAST CORPORATION |
| Toshiba Infrastructure Systems & Solutions Corporation |
| FUNAI ELECTRIC CO., LTD. |
| Miharu Communications Inc |
| OPTAGE Inc. |
| Video Research Ltd. |
| Socionext Inc. |
| Jupiter Telecommunications Co., Ltd |
| JapanCableCast inc. |
| MEDIACAST CO.,LTD |
| ACCESS Co., Ltd. |
| sMedio, Inc. |
| DigiOn, Inc. |
| CHUKYO ELECTRON Co.,Ltd. |
| PIXELA CORPORATION |
| J-Stream Inc. |
| IPv6 Promotion Council |
| Asial Corporation |
| VALTES CO.,LTD |
| TVS REGZA Corporation |
| CATV Tokushima Co.,Inc. |
| OKI Networks Co., Ltd. |
| Humax Japan Co., Ltd. |
| SKY Perfect JSAT Corporation |
| IT Access Co.,Ltd. |
| Cisco Systems G.K. |
| Akamai Technologies GK |
| The Open University of Japan |
| SIGMAXYZ Inc. |
| Harmonic Japan G.K. |
| NTT TechnoCross Corporation |
| Japan Cable Laboratories |
| Itochu Techno-Solutions Corporation |
| WebStream Corporation |
| INFOCITY, Inc. |
| COMMUNITY NETWORK CENTER INCORPORATED. |
| T-NET JAPAN Co., Ltd. |
| Upstream Co., Ltd. |
| Digiasa Inc. |
| Newmedia co.,Ltd. |
| ARRIS Group Japan K.K. |
| Rexcel Nippon Co., Ltd. |
| PLAY, inc |
| ESWIN Japan Inc. |
