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Status of the Johkasou Installation at the end of FY 2008

March 15, 2010

The installation number of Johkasou (Japanese waste water treatment system) at the end of FY 2008 (the end of March, 2009) was 8.36 million. The breakdown of this, amalgamation processing by Johkasou that combine and process night soil and miscellaneous drainage account for about 35% of the whole at 2.90 million, and Tandoku-shori Johkaso (single processing Johkasou) where only night soil is processed account for about 65% of the whole at 5.45 million. The number of new installations of Johkasou in FY 2008 was 154,000, which was an increase of about 130,000 from FY 2007, including abolition of capitation.
The inspection rate of water quality inspection based on Article 7 of the Johkasou Law for the purpose of determining whether Johkasou are performing desired functions after installation reached 89.9%, increased by 2.0 points compared to FY 2007. The rate of periodical annual inspection based on Article 11 of the above mentioned law for the purpose of determining whether Johkasou are properly maintained and managed, and whether their functions are normally maintained, reached 27.2%, increased by 1.5 points compared to FY 2007 (the rate reached and the points increased for only Johkasou (the amalgamation processing type) were 48.5% and 1.5 points respectively).

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