Kanamachi-Jōsuijō, Municipal waterworks facility in Katsushika-ku, Japan
Kanamachi-Jōsuijō is a water treatment facility in Katsushika that supplies cleaned water to Tokyo residents through a network of pipes. The plant processes raw water using multiple filtration stages before distributing it across the eastern part of the city.
The facility was constructed in the second half of the 20th century to meet Tokyo's growing water needs during rapid urban expansion. It became one of several treatment plants developed to modernize the city's water supply system after World War II.
The facility maintains traditional Japanese engineering principles while incorporating modern water treatment methods to serve the local population of Katsushika.
The site is best visited on weekdays when the facility operates normally and guided access may be arranged. Not all areas of the plant are open to the public, so checking ahead is important.
The facility uses natural elevation differences to distribute water without relying on pumps, significantly reducing electricity consumption. This method combines traditional water management thinking with practical efficiency.
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