Japan domestic | EiwaCorp.
| Nippon Sokki Co.,Ltd.
| Todoroki Sangyo Co.,Ltd.
| Kitahama Co.,Ltd.
| Endo Scientific Instrument Co.,Ltd. | Seika Corp.
|
| | Overseas | RTCK Co.,Ltd. | Yantai Int Measure Instrument Co.,Ltd.
| Sun-Opto Technology Corporation | Today's Instruments Co.,Ltd. | ISI Control Sdn Bhd.
| PVN Engineering Co.,Ltd.
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