Domestic
- Aisin Corporation
- Aisin Takaoka Co., Ltd.
- Aichi Machine Industry Co., Ltd.
- Akashi Kikai Industry Co., Ltd.
- Isuzu Motors Limited
- Iseki & Co., Ltd.
- Inoue Special Steel Co., Ltd.
- Ibara Seiki Co., Ltd.
- The Iyo Bank, Ltd.
- Exedy Corporation
- Enatech Corporation
- NC Network Factory Co., Ltd.
- Osaka Seiko Limited
- Ondo Corporation
- Kanehira Steel Co., Ltd.
- Kawasaki Heavy Industries, Ltd.
- Kawamura Tekko Co., Ltd.
- Kitagawa Iron Works Co., Ltd.
- Caterpillar Japan LLC.
- The Kure Sinkin Bank
- Kubota Corporation
- Kobe Steel, Ltd.
- Japan Bank for International Cooperation
- Komatsu Ltd.
- Sakamoto Iron Works Co., Ltd.
- Satoshoji Corporation
- JFE Bars & Shapes Corporation
- GKN Driveline Japan Ltd
- IJTT Co., Ltd.
- Jatco Ltd
- Nippon Steel Corporation
- Suzuki Motor Corporation
- Subaru Corporation.
- Reiwa Speciality Steel Corporation
- Sumitomo Corporation
- Sohshin Co., Ltd.
- Dynax Corporation.
- Daihatsu Motor Co., Ltd.
- Daihatsu Metal Co., Ltd.
- Taiyo Machinery Mfg. Co., Ltd.
- Taiyo Shoji Co., Ltd.
- Takenaka Corporation.
- The Chugoku Bank
- THK Co., Ltd.
- Toyota Motor Corporation
- Toyota Tsusho Corporation
- Toyotsu Tekkou Hanbai Corporation
- Nakayama Steel Works, Ltd.
- Namicoh Co., Ltd.
- Nikkoseiki Co., Ltd.
- Nissan Kohki Co., Ltd.
- Nissan Motor Co., Ltd.
- NHK Sales Co., Ltd.
- Niwa Industry Co., Ltd.
- Hanwa Co., Ltd.
- Hino Motors, Ltd.
- The Hiroshima Bank, Ltd.
- Fukae Special Steel Co., Ltd.
- Fuji Kiko Co., Ltd.
- Fuso Kogyo Co., Ltd.
- Honda Motor Co., Ltd.
- Honda Trading Corporation
- Mahle Electric Drives Japan Corporation
- Mazda Motor Corporation
- Mizuho Bank, Ltd.
- Mitsui E&S Power Systems Inc.
- Mitsubishi Motors Corporation
- Mitsubishi Heavy Industries, Ltd.
- Mitsubishi Electric Corporation
- Mitsubishi Fuso Truck and Bus Corporation
- Mitsubishi Logisnext Co., Ltd.
- Miyama Industry Co., Ltd.
- The Momiji Bank, Ltd.
- The Yamaguchi Bank, Ltd.
- Yamaha Motor Co., Ltd.
- Yanmar Co.,Ltd.
- Yutaka Giken Co., Ltd.
- UD Trucks Corporation.
- Yoshiwa Kogyo Co., Ltd.
- Yorozu Corporation
Overseas
