Main customer
| Japan Maritime Self-Defense Force | Japan Coast Guard | Kubota Corporation |
| Nippon Steel Corporation | TORISHIMA PUMP MFG. CO., LTD | Ebara Corporation |
| Mitsubishi Heavy Industries ,Ltd. | Mitsui Engineering & Shipbuilding Co., Ltd. | Kawasaki Shipbuilding Corporation |
| Universal Shipbuilding Corporation | Hitachi Plant Technologies, Ltd. | IHI Marine United Inc |
| Nippon Paper Industries Co., Ltd. | Mitsubishi-Hitachi Metals Machinery,Inc. | DMW Corporation |
| JFE Steel Corporation | Akasaka Diesels Limited | Toyo Kohan Co.,Ltd. |
| HANSHIN DIESEL WORKS, LTD. | Nisshin Steel Co.,Ltd. | Niigata Power Systems Co., Ltd. |
| Yodogawa Steel Works, Ltd. | Daihatsu Diesel Mfg. Co., Ltd. | KURARAY CO., LTD. |
| Mitsubishi Rayon Engineering Co., Ltd. |
