Founder Members (in alphabetical order; 21 companies)
- Dentsu Inc.
- Fuji Television Network, Inc.
- Fujitsu Ltd.
- Japan Broadcasting Corporation
- Jupiter Telecommunications Co., Ltd.
- KDDI Corporation
- NEC Corporation
- Nippon Telegraph and Telephone Corporation
- Nippon Television Network Corporation
- Panasonic Corporation
- Sharp Corporation
- SKY Perfect JSAT corporation
- SoftBank Corp.
- Sony Corporation
- Sumitomo Corporation
- Tohokushinsha Film Corporation
- Tokyo Broadcasting System Television,Inc.
- Toshiba Corporation
- TV Asahi Corporation
- TV Tokyo Corporation
- WOWOW Inc
B Members (in alphabetical order; 61 companies)
- ACCESS CO.,LTD.
- Actvila Corporation
- Agence France Presse
- Asahi Broadcasting Corporation
- ASTRODESIGN, Inc.
- BOE Japan Co.,Ltd.
- Broadcasting Satellite System Corporation
- BS Conditional Access Systems Co.,Ltd.
- Canon Inc.
- CBC TELEVISION CO.,LTD.
- Chukyo TV. Broadcasting Co., LTD.
- DigiOn, Inc.
- Dolby Japan K.K.
- EIDEN Co.,Ltd.
- Fishing Vision Co.,Ltd.
- FOR-A COMPANY LIMITED
- FUJIFILM Corporation
- Hakuhodo DY media partners Inc.
- Harmonic Japan G.K.
- Hitachi Kokusai Electric Inc.
- Ikegami Tsushinki Co.,Ltd.
- Imagica Robot Holdings Inc.
- Imagination Technologies KK
- Internet Initiative Japan Inc.
- I-O DATA DEVICE, INC.
- Japan CableCast Inc.
- Japan Digital Serve Corporation
- Kansai telecasting corp.
- KEISOKU GIKEN Co.,Ltd.
- K-Opticom Corporation
- KYOSHIN COMMUNICATIONS Co., Ltd.
- LG Electronics Japan Lab Inc.
- Mainichi Broadcasting System, Inc.
- Media Global Links Co., Ltd.
- Miharu Communications Inc
- MITOMO Co.,Ltd
- MITSUBISHI ELECTRIC CORPORATION
- nac Image Technology Inc.
- Nagoya Broadcasting Network Co.,Ltd.
- Nexion Corporation
- NHK EDUCATIONAL CORPORATION
- NHK ENTERPRISES, INC.
- NHK Integrated Technology Inc.
- NHK Media Technology, Inc.
- NTT Plala Inc.
- PIXELA CORPORATION
- Plat-Ease Corporation
- Q-TEC,INC.
- Rohde & Schwarz Japan K.K.
- Samsung R&D Institute Japan Co.LTD.
- sMedio, Inc.
- SPACE SHOWER NETWORKS INC.
- STAR CHANNEL Inc.
- Sumitomo Electric Industries, Ltd.
- TELEVISION OSAKA, Inc.
- The Walt Disney Company (Japan) Ltd
- TOKAI TELEVISION BROADCASTING Co.,Ltd
- TOKYO LABORATORY LTD.
- Tokyo Metropolitan Television Broadcasting Corporation
- World Hi-Vision Channel, Inc.
- Yomiuri Telecasting Corporation
Supporting Members (in alphabetical order; 38 companies)
- Adobe Systems K.K.
- Arxan Technologies Inc.
- Association of All Japan TV Program Production Companies
- AT Communications k.k.
- Broadcast Satellite Disney Co., Ltd.
- Corning Japan K.K.
- Datalex Inc.
- Digital Life Promotion Association
- Elemental Technologies GK
- Explorer inc.
- Fraunhofer IIS
- HUMAX Co., Ltd.
- IMAGICA Corp.
- IMAGICA TV Corp.
- IMAGICADIGITALSCAPE Co., Ltd.
- Japan Cable and Telecommunications Association
- Japan Cable Laboratories
- Japan Electronics and Information Technology
industries Association
- Japan Satellite Broadcasting Association
- J-Stream Inc.
- M Data Co.,Ltd.
- maruvishi Ltd.
- MEDIACAST CO., LTD.
- Multiscreen Broadcasting Conference
- NIPPON ANTENNA CO., LTD.
- NTT Electronics Corporation
- ORIX Corporation
- P.I.C.S. Co.,Ltd
- PHOTRON LIMITED
- Rikkyo University
- SCSK Corporation
- TELETECH CO.,LTD
- the Federation of Music Producers Japan
- the Japan Commercial Broadcasters Association (JBA)
- VALTES CO.,LTD.
- Waseda University
- Yokogawa Digital Computer Corporation
- YOKOGAWA Rental&Lease Corporation