With water supply business guidelines
It is standard to apply to water supply business entities which JAPAN WATER WORKS ASSOCIATION which secures efficiency of management, transparency of business management, and constitutes service standard of channel business of Japan for the purpose of improving in water supply business affiliate of the whole country (public corporation) established in January, 2005 of the whole country. It revised in March, 2016.
Water supply business guidelines duties index (2018 version) (PDF: 1,013KB)
Inquiry about water supply to Water Works Bureau customer Service Center
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