Profile of facilities

System Flow

The Integrated Seawater Desalination and Sewage Reuse System

Inside the approximately 6,000m² premises of Water Plaza Kitakyushu, lies a “demo plant” for the demonstration of an advanced water recycling and reuse system and a “test bed” to develop cutting-edge technologies. The demo plant, which employs an energy saving, low cost and low environmental impact water production system integrating both seawater desalination and sewage recycling processes, produces 1,400m³ of water per day. At the test bed (5 zones), R&D activities can be conducted utilizing six types of water from the demo plant.

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Features of the Integrated Seawater Desalination and Sewage Reuse System
MBR UF 下水系RO 海水系RO 生産水(飲料水レベル)

Facilities Drawing


96-1, Nishiminato-machi, Kokurakita-ku, Kitakyushu City, Fukuoka Pref. 803-0801
c/o Hiagari Sewage Treatment Plant
By car
5 minutes from the Hiagari IC of the Kitakyushu Urban Expressway-2.
Water Plaza Kitakyushu has a parking lot for guests.
By train
JR Kokura Station, 15-minute taxi to the plaza


International Project Division, Water and Sewer Bureau, City of Kitakyushu
1-1, Otemachi, Kokurakita-ku, Kitakyushu City, 803-8510