| ARS BRIDGE & ENGINEERING CO.,LTD. |
| FaB-Tec Japan Corporation |
| FURUKAWA INDUSTRIAL MACHINERY SYSTEMS CO.,LTD. |
| Hitachi Zosen Corporation |
| HOKUTO TEKKO Co.,Ltd |
| IHI Corporation |
| IHI Infrastructure Systems Co.,Ltd. |
| IHI Construction Service Co.,Ltd. |
| Japan Bridge Corporation |
| JST Co.,LTD. |
| JFE Engineering Corporation |
| KAWADA CONSTRUCTION CO.,LTD. |
| KAWADA INDUSTRIES, INC. |
| KOMAIHALTEC Inc. |
| KUSHIRO SEISAKUSHO,CO.,LTD. |
| Mitsui E&S Steel Structures Engineering Co.,Ltd. |
| MIYAJI ENGINEERING CO., LTD |
| MM BRIDGE CO.,LTD. |
| NAMURA SHIPBUILDING CO.,LTD. |
| Narasaki Seisakusyo Co.,Ltd. |
| NIPPON SHARYO,LTD. |
| Oshima Shipbuilding Co.,Ltd. |
| SATO TEKKO CO.,LTD. |
| TAKADA KIKO CO.,LTD. |
| The Takigami Steel Constrution Co.,Ltd. |
| The Uno Heavy Industry Company, Limited |
| TOKO BRIDGE CO.,Ltd. |
| TOMOE CORPORATION |
| UBE MACHINERY CORPORATION,LTD. |
| Yokogawa Bridge Corp. |
| Yokogawa Sumikin Bridge Corp. |
