Main Sales and Purchase（Alphabetical order）
- FUJI KASEI CO.,LTD.
- FUTAMURA CHEMICAL CO.,LTD.
- HOEI KOGYO Co.ltd.,
- INOUE CALCIUM CORPORATION
- ITOCHU Metals Corporation
- JX Nippon Takasho CO.,LTD.
- KUNO SANGYO CO.,LTD.
- Minabe Chemical Industries Co.,Ltd.
- Mitsubishi Chemical Holdings Corporation
- Mitsubishi Materials Corporation
- MITSUI MINING & SMELTING CO.,LTD.
- OHGITANI Corporation
- SAKAI CHEMICAL INDUSTRY CO.,LTD.
- Sumitomo Metal Mining Co., Ltd.
- TANNAN KAGAKU KOGYO CO.LTD.
- TAYCA Co., Ltd.