Ministry of the Environment has released new Leaflets 

   Appropriate treatment of domestic Wastewater 

   - Protection of People's Health and the Water Environment - 

   If you wonder "Why should we treat Gray water, too?", 

   we recommend you to read this leaflet.

   Japanese decentralized wastewater treatment facility

   - Characteristics of Johkasou -

   If you want to know "How does Johkasou differ from the other facilities?", 

   we recommend you to read this leaflet.