Test Equipments (Network Analyzers / Spectrum Analyzers / Signal Generators etc.)
- Advantest Corp.
- Agilent Technologies JAPAN, Ltd.
- AMT, Inc.
- Azimuth Systems, Inc. [Toyo Corp.]
- Bluetest AB [Toyo Corp.]
- Boonton Electronics [CORNES DODWELL LTD.]
- Centellax, Inc. [PTM Corp.]
- Colby Instruments, Inc. [Farad Corp.]
- CORNES DODWELL LTD.
- Digital Signal Technology, Inc.
- Emcore Broadband [M-RF Co., Ltd.]
- Enviro Mentor AB [Farad Corp.]
- ETS-Lindgren Japan, Inc.
- Farad Corp.
- Giga-tronics, Inc. [Midoriya Electric Co., Ltd.]
- Hittite Microwave Corp. [Farad Corp.]
- IndexSAR, Ltd. [Toyo Corp.]
- J Micro Technology [Rikei Corp.]
- Keisoku Engineering System Co., Ltd.
- Keycom Corp.
- Maury Microwave Corp. [Seki Technotron Corp.]
- MicroWave Factory Co., Ltd.
- Midoriya Electric Co., Ltd.
- Mini-Circuits [Mini-Circuits Yokohama, Ltd.]
- Mini-Circuits Laboratory, Inc. [M-RF Co., Ltd.]
- Mini-Circuits Yokohama, Ltd.
- M-RF Co., Ltd.
- National Instruments Japan Corp.
- Nearfield Systems, Inc. [Farad Corp.]
- OML, Inc. [Farad Corp.]
- Pendulum, Inc. [Toyo Corp.]
- PTM Corp.
- Reprorise, Inc.
- Rikei Corp.
- Rohde & Schwarz Japan K.K.
- Seikoh Giken Co., Ltd.
- Seki Technotron Corp.
- Spirent Communications Performance Analysis, Wireless [Toyo Corp.]
- Spirent Communications Positioning Technology [Toyo Corp.]
- Summitek Instruments, Inc. [Seki Technotron Corp.]
- Takitek K.K.
- Technoprobe Co., Ltd.
- TEGAM, Inc. [Toyo Corp.]
- Toyo Corp.
- Troicom, Inc. [PTM Corp.]
- Wakoh Communication Industrial Co., Ltd.