- ALPS ELECTRIC CO., LTD.
- Canon Inc.
- CITIZEN ELECTRONICS CO., LTD.
- DENSO CORPORATION
- Du Pont Japan
- FDK CORPORATION
- Fujikura Ltd.
- FUJITSU Group
- Harima Chemicals, Inc.
- Hitachi Group
- Honda Engineering Co., Ltd.
- Intel Corporation
- ITOCHU Corporation
- Iwatani International Corporation
- KYOCERA Corporation
- Mitsubishi Electric Group
- Murata Manufacturing Co., Ltd.
- NGK SPARK PLUG CO., LTD.
- Noritake Ceramics Co., Ltd.
- OMRON Corporation
- Panasonic Group
- Sankyo Corporation
- SANYO Electric Co., Ltd.
- SEIKO EPSON CORPORATION
- Sekisui Chemical Co., Ltd.
- SHINKO ELECTRIC INDUSTRIES CO., LTD.
- Sony Corporation
- Sumitomo Metal Industries, Ltd.
- TDK Corporation
- TERUMO CORPORATION
- TOSHIBA CORPORATION
- UBE INDUSTRIES LTD.
- ULVAC Inc.