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About the Status of Johkasou Installation at the End of Fiscal 2009

March 14, 2011

The installation number of Johkasou (Japanese waste water treatment system) of the end of fiscal 2009 (the end of March, 2010) was 8.16 million. The breakdown of this, amalgamation processing by Johkasou that combine and process night soil and miscellaneous drainage account for about 37% of the whole at 2.99 million, and Tandoku-shori Johkaso (single processing Johkasou) where only night soil is processed account for about 63% of the whole at 5.17 million. The number of new installations of Johkasou in fiscal 2009 was 137,000, which was an increase of about 100,000 from fiscal 2008, 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 90.8%, increased by 0.9 points compared to fiscal 2008. 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 28.7%, increased by 1.5 points compared to fiscal 2008 (the rate reached and the points increased for only Johkasou (the amalgamation processing type) were 50.0% and 1.5 points respectively).

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