Main Sales and Purchase(The Japanese syllabary order)
 Itochu Metals Co.,Ltd.
 Inoue Calcium Co.,Ltd.
 Ohgitani Co.,Ltd
 Sakai Chemical Industry Co.,Ltd.
 San-etsu Metal Co.,Ltd.
 Mitsubishi Shindoh Co.,Ltd.
 Sumitomo Metal Mining Co.,Ltd.
 Tannan Chemical Industries Co.,Ltd.
 Tayca Corporation
 JX METALS TRADING CO., LTD.
 Nippon Shindo Co.,Ltd.
 Futamura Chemical Industries Co.,Ltd.
 Panasonic Co.,Ltd. Energy Company
 MITSUI KINZOKU
 Mitsubishi Chemical Corporation
 Mitsubishi Corporation RtM Japan Ltd.
 Mitsubishi Materials Corporation
 Minabe Kakou Co.,Ltd.

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