IHI Corporation

ISHIBASHI Manufacturing Co., Ltd.

Idemitsu Kosan Co., Ltd.

Marubeni-Itochu Techno Steel Inc.

Marubeni-Itochu Steel Inc.

Imabari Shipbuilding Co., Ltd.

UEDA SEISAKUSHO Corporation

EBARA CORPORATION

Osaka Gas Co., Ltd.

Oshima Shipbuilding Co., Ltd.

ONOMICHI DOCKYARD CO., LTD.

ORGANO CORPORATION

Kajima Corporation

KASHIMA OIL CO., LTD

Kawasaki Heavy Industries, Ltd.

The Kansai Electric Power Co., Inc.

KYGNUS SEKIYU K.K.

Kyowakiden Co., Inc.

NOHMI BOSAI LTD.

Kusakabe Kikai Co., LTD.

KUBOTA Corporation

Kurita Water Industries Ltd.

Kobe Steel, Ltd.

Koyo Dockyard Co., Ltd.

COSMO OIL CO., LTD.

INPEX CORPORATION

Sasebo Heavy Industries Co., Ltd.

Sanoyas Holdings Corporation

SANWA TEKKI CORPORATION

J-POWER

JX Nippon Oil & Energy Corporation

JFE Engineering Corporation

JFE Steel Corporation

Jpec Co., Ltd.

Shikoku Electric Power CO., Inc.

Shizuoka Gas Company, Ltd.

SHIMIZU CORPORATION

SHOWA SHELL SEKIYU K. K.

Shin Kurushima Dockyard CO., LTD.

Shinko Plantech Co., Ltd.

NIPPON STEEL & SUMIKIN ENGINEERING CO., LTD.

SHINRYO CORPORATION

JP Steel Plantech Co.

Sumitomo Heavy Industries, Ltd.

NIPPON STEEL & SUMIKIN Pipeline & Engineering Co., Ltd.

Sumitomo Chemical Engineering Co., Ltd.

Sumitomo Heavy Industries Marine & Engineering Co., Ltd.

Sumitomo Corporation

SEIBU ELECTRIC & MACHINERY CO., LTD.

SEKISUI CHEMICAL CO., LTD.

Japan Petroleum Exploration Co., Ltd.

Taihei Dengyo Kaisha Ltd.

Taiyo Oil Company, Limited

Takasago Thermal Engineering Co., Ltd.

TAKUMA CO., LTD.

The Chugoku Electric Power Co., Inc.

CHUBU Electric Power Co., Inc.

Chiyoda Corporation

TSUKISHIMA KIKAI CO., LTD.

Tsuneishi Holdings Inc.

TOA OIL CO., LTD.

Tokyu Car Corporation

Tokyo Gas Co., Ltd.

The Tokyo Electric Power Company, Incorporated

TOSHIBA CORPORATION

TOSHIBA PLANT SYSTEMS & SERVICES CORPORATION

Tonen General Sekiyu K.K.

Toho Gas Co., Ltd.

Tohoku Electric Power Co., Inc

Toyo Engineering Corporation

Takenaka Corporation

Namura Shipbuilding Co., Ltd.

Nishinippon Plant Engineering and Construction Co., Ltd.

JGC Corporation

Nippon Rensui Co.

Nippon Aluminium Co., Ltd.

The Japan Steel Works, LTD.

Nippon Roballo Co., Ltd.

NIPPON STEEL & SUMITOMO METAL CORPORATION

Babcock-Hitachi k.k.

HANWA CO., LTD.

Hitachi Power Solutions Co., Ltd.

Hitachi, Ltd.

Hitachi Zosen Corporation

Hiroshima Gas Co., Ltd.

Fuji Heavy Industries Ltd.

Fuji oil company, Ltd.

Hokkaido Electric Power Co., Inc.

Primetals Technologies Japan, Ltd.

Sumitomo Mitsui Construction Co., Ltd.

Mitsui Engineering & Shipbuilding Co., Ltd.

MITSUI & CO., LTD.

Mitsubishi Kakoki Kaisha, Ltd.

Mitsubishi-Hitachi Metals Machinery, Inc.

Metal One Corporation

KITANIHON SHIPBUILDING CO., LTD.

Tsuha Sharyo, Ltd.

The Hakodate Dock Co., Ltd.