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1972
Sewage Works Centre established
First construction agreement with Kawagoe city, Saitama
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1973
Kansai branch office starts as a base of western Japan
Sewerage Training Program starts
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1975
R&D Center established
First entrusted WWTP starts running in Motobu town, Okinawa
Restart as Japan Sewage Works Agency
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1976
First qualification test for sewage technology
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1977
First commendation of Excellent Construction Works
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1982
Award-winning Japan’s first WWTP with modified activated sludge circulation process starts running in Lake Biwa river-basin sewerage
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1983
Total number of trainees completed JS Training Program run to 10,000
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1985
"Oxidation Ditch Process" and “Sewage Sludge Composting Technology“ established
Award-winning WWTP with drop caisson method starts running in Atami City, Shizuoka
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1987
Examination and certification system of technology developed by private sector starts (until 1997)
First qualification test for sewage management technology
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1988
Japan’s first WWTP with POD (Prefabricated Oxidation Ditch) process starts running in Nakanojo town, Gunma
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1989
ACE Centers starts in north-east Osaka, east Hyogo and west Hyogo
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1990
ACE Center starts in south Osaka
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1991
World's first small-footprint Nitrogen removal bioreactor "PEGASUS" starts running in ACE center of north-east Osaka
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1992
Japan’s first WWTP with Tunnel "Clean Capsule" starts running in Kashima town, Shimane
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1995
Recovery support from Kobe Earthquake
Bidding and contracting procedure revised
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1997
JS Innovation Program starts
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1999
Project Management System starts full-scale operation
First order of Design Build (DB) method
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2000
Award-winning Naniwa discharge channel completed : constructed by shield method, adopting pumping station with sand sedimentation
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2001
Japan’s first sewage sludge treatment facility with carbonization system starts running in Lake Biwa river-basin sewerage
R&TD Experiment Center starts in Mohka City, Tochigi
“Step-feed multistage nitrification/ denitrification process” established
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2003
Restart as special public organization
“MBR” and “Sewage Sludge Carbonization System” established
Mid-term Management Plan developed
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2004
Seven regional offices start up
Recovery support from 2004 Chuetsu Earthquake
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2005
“Sludge Reduction using Ozone/ Thermophile“ established
Energy-saving and environmentally friendly system with wind-power generation awarded
Japan’s first WWTP using MBR starts running in Fukusaki Town, Hyogo
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2006
New Mid-term Management Plan developed
“Utilization of Activated Sludge Model” enables computer simulation established
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2007
Recovery support from 2007 Chuetsu Offshore Earthquake
Support for municipalities’ adoption of AM officially starts
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2008
Total number of trainees completed JS Training Program runs to 50,000
"Corrosion Prevention Technology by Sulfuric-Acid-Resistant Mortar“, "Sewage Biomass Energy System” established
“Adoption of Asset Management for Sewerage Facilities” awarded
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2009
“Beneficial Uses of Sewage Sludge as Resource” awarded
Third Mid-term Management Plan developed
“Ozonation Technology” and “Nitrogen Removal Technology Using ANAMMOX” established
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2010
“Retrofit of Aging Facilities to Reduce Greenhouse Gas Emission” awarded
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2011
Recovery support from Tohoku Earthquake
Sambo WWTP with large-scale MBR starts running in Sakai City
International Affairs Office, Technology & Strategy Department start up
New Innovation Program starts
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2012
Forth Mid-term management plan developed
"Anaerobic Digestion Process aimed Energy Recovery“ established
Total number of trainees completed JS Training Program runs to 60,000
