■Domestic
●JFE Steel Corporation●Kobe Steel, Ltd.
●Nippon Steel Corporation
●Nippon Steel Stainless Steel Corporation
●Nippon Steel Coated Sheet Corporation
●Nippon Yakin Kogyo Co., Ltd.
●UACJ Corporation
●Yodogawa Steel Works, Ltd.
Others (Alphabetical Order)
■Overseas
●ARCELORMITTAL●BAO STEEL
●CLEVELAND-CLIFFS TEK
●CSC
●NS-Siam United Steel Co.,Ltd.
●POSCO
●TENIGAL
●UNIGAL
Others (Alphabetical Order)
MAIN BUSINESS PARTNERS
■Customers
●Chugai Ro Co., Ltd.●DUMA-BANDZINK GmbH （Germany)
●Hotani Trading (Shanghai) Co., Ltd.
●JFE Steel Corporation
●JFE Shoji Corporation
●JP Steel Plantech Co.
●KRST Co., Ltd. （Korea）
●Kyowa Kiko Co., Ltd.
●Mitsubishi Corporation
●Nippon Steel Corporation
●Nippon Steel Stainless Steel Corporation
●Osborn International Group (America, England, Germany, Mexico, India)
●O-WELL Corporation
●Posco International Group (Korea)
●Primetals Technologies Japan, Ltd.
●Sanwa Industries, Ltd.
●Shimabun Corporation
●Shinsho Co., Ltd.
●Tien Kwang Shin Ind. Co.,Ltd.
●Union Engineering Co., Ltd.
Others (Alphabetical Order)