| Altera | Nikon Corporation |
| Asahi Optical Co., Ltd. | Nippon Bio-Rad Laboratories |
| Asia Electronics Inc. | Nippon Motorola Micro Electronics Corp. |
| Bausch & Lomb Japan Ltd. | Nippon Pillar Packing Co., Ltd. |
| Calcomp Japan Procurement K.K. | Nippon Sherwood Medical Industries Ltd. |
| Canon Inc. | Noritsukoki Co., Ltd. |
| Carl Zeiss Co., Ltd. | Olympus Optical Co., Ltd. |
|
Central Denshi Seigyo |
Ono Sokki Co., Ltd. |
| Chinon Industries, Inc. | Orbotech Japan Co., Ltd. |
|
Chinon Industries, Inc. |
Pip-Fujimoto Co., Ltd. |
|
Citizen Watch Co., Ltd. |
Rhythm Watch Co., Ltd. |
| Copyer Co., Ltd. |
Noritsukoki Co., Ltd. |
|
Dade Behring Ltd. |
Ricoh Co., Ltd. |
| Dainippon Screen Mfg., Ltd. | Ricoh Elemex Corporation |
| Dia Systems Inc. | S.L.T. Japan Co., Ltd. |
| Elco International K.K. | Schlumberger K.K. |
| Fisher-Rosemount Japan Co., Ltd. | Schneider |
| Fuji Photo Optical Co., Ltd. | Schroff K.K. |
| Fuji Xerox Co., Ltd. | Seiko Epson Corporation |
| Guidant Japan K.K. | Seiko Instruments Inc. |
| Hakuju Health Science Company Ltd. | Seikosha Co., Ltd. |
| Hamada Heavy Industries, Ltd. | Sena Co., Ltd. |
| Heraeus Electro-Nite Japan | Sendai Nikon Corporation |
| Heraeus Kulzer Japan Co., Ltd. | Shimadzu Corporation |
| Hitachi Vlsi Engineering Co. | Shofu |
| Horiba, Ltd. | Sony Precision Technology Inc. |
| Hoya Corporation | Sony Tektronix Corporation |
| JMS Co., Ltd. | Samsung Electronics Inc. |
| Johnson Electric World Trade Limited | Sun Medical Co., Ltd. |
| Kanematsu Industry Machinery Limited | Suss Microtec K.K. |
| Kawasumi Laboratories, Inc. | Sysmex Co. |
| KDK Corporation | Tanita Corporation |
| Kulick And Soffa Japan Ltd. | Tatsuno Co., Ltd. |
| Kyocera Mita Corporation | The Yoshida Dental Mfg. Co., Ltd. |
| Lecroy Japan Corporation | Tokai Optical Co., Ltd. |
| Leybold Co., Ltd. | Tokimec Inc. |
| Linear Technology (Japan) K. K. | .Tokyo Boekj Techno-System Ltd. |
| Macnica Inc. | Tonokuraika Kogyo Co., Ltd. |
| Marubeni Electronics Co., Ltd. | Topcon Corporation |
| Minolta Co., Ltd. | Wacom Ltd. |
| Mitutoyo | Xebec Co., Ltd. |
| Nidec Copal Electronics Corp. | Y.O. Systems Inc. |
| Nidek Co., Ltd. | Yamato Scientific Co., Ltd. |
|
Nihon Mathys K.K. |