Nagasawa Purification Plant

The Nagasawa Purification Plant is a water treatment facility in Tama-ku that converts raw water into drinking water through multiple filtration stages and chemical processes. The plant continuously supplies treated water to surrounding communities and plays a key role in maintaining the region's water supply.

The facility was established during Japan's industrial modernization period and carries architectural features designed by Mamoru Yamada that reflect mid-20th century industrial design. Its development is closely tied to the expansion of urban water infrastructure in the region.

The facility participates in educational programs that teach residents about water conservation methods and the importance of clean water resources.

The facility is located in an industrial area and may be accessible for visits under certain conditions with prior arrangement. Visitors should note that this is an active processing site where sensitive areas may not be open to the public.

The facility employs specific technical adaptations designed to handle the unique water composition of local sources and address regional environmental conditions. These tailored modifications allow the plant to respond effectively to the particular water supply challenges of Kanagawa Prefecture.