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ISO9001 Certified Departments
- Quality Assurance Division
- Technology Division
- Construction Division
- Kashima Sales Office
- Hasaki Sales Office
- Mizushima Sales Office
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ISO9001 / ISO14001 Certified Departments
- Hanawa Plant No. 1
- Hanawa Plant No. 2
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ISO9001 / ISO14001 Certified Departments
- Shirakawa Plant