| * NTN Corporation |
* Aisin Group |
| * Aichi Machine Industry Co.,Ltd. |
* Isuzu Motors Ltd. |
| * Kawasaki Heavy Industries, Ltd. |
* Kubota Corporation |
| * Jatco Ltd |
* Suzuki Motor Corporation |
| * Daihatsu Motor Co., Ltd. |
* Toyota Industries Corporation |
| * Toyota Motor Corporation |
* Nissan Kohki Co.,Ltd. |
| * Nissan Motor Co., Ltd. |
* Nissan Diesel Motor Co., Ltd. |
| * Nittan Valve Co., Ltd. |
* NSK Ltd. |
| * Hitachi, Ltd. |
* Hino Motors, Ltd. |
| * Fuji OOZX Inc. |
* Fuji Heavy Industries Ltd. |
| * Honda Motor Co., Ltd. |
* Mazda Motor Corporation |
| * Mitsubishi Motors Corporation |
* Mitsubishi Heavy Industries, Ltd. |
| * Mitsubishi Fuso Truck & Bus Corporation |
* Musashi Seimitsu Industry Co.,Ltd. |
| * Yanmar Co., Ltd. |
* Ryobi Limited |
| # SUMCO Corporation |
# MEMC Electronic Materials, Inc |
| # Komatsu Electronic Metals Co.,Ltd. |
# Siltronic Japan Corporation |
| # Shin-Etsu Chemical Co., Ltd. |
# Shin-Etsu Handotai Co., Ltd. |
| # Toshiba Ceramics Co., Ltd. |
# Tosoh Quartz Corporation |
| # Mimasu Corporation |
|
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