| November, 1974 |
Environmental Facility Center established with a capital of 5,000,000 yen |
| May, 1977 |
Capital Increased to 10,000,000 yen |
| May, 1979 |
Institute of Technology established; beginning of Measurement Laboratory Service. |
| June, 1981 |
"Mobile Dewatering Vehicle" self-developed; beginning to utilize |
| December, 1981 |
Machida plant established |
| April, 1982 |
"Belt Thickener" self-developed; beginning the production and distribution. |
| April, 1984 |
Capital Increased to 40,000,000 yen |
| September, 1984 |
The Meguro headquarter building established |
| October, 1984 |
Beginning the 24H monitoring service by AMCON 24 Distance Monitoring System |
| October, 1987 |
Changing the company name to "AMCON INC." |
| April, 1991 |
Beginning the production and distribution of Volute Thickener & Dewatering Press |
| March, 1992 |
Beginning the production and distribution of Volute Dewatering Press (New Model) to private industries |
| February, 1993 |
Beginning the production and distribution of Polymer Coagulant "Hybrid V" |
| December, 1993 |
"The first unit for the official demand" set out in the sewage plant in Shojyaku, Suita-City（Thickener） |
| June, 1994 |
Beginning the preliminary experimentation of dewatering performance in cooperation with Japan Sewage Works Agency（At the disposal plant in Toyota City） |
| November, 1994 |
Taking out the "US patent" on Volute Dewatering Press |
| March, 1995 |
Made a breakthrough of the 100th installation in private industries |
| July, 1995 |
Beginning the Cooperative Research with Japan Sewage Works Agency with a theme of "Direct Dewatering of Sludge from Oxidation Ditch"（at the Water Quality Management Center in Shiman,Nakanojo-cho, Gunma） |
| September, 1995 |
Volute assembling plant moved to Yokohama |
| November, 1995 |
Taking out the "Japanese patent" on Volute Dewatering Press |
| April, 1996 |
Beginning the production and distribution of Bio Dryer Dell Compo |
| April, 1997 |
Pint-sized Sewer Model "MS series" developed ; Beginning to sell |
| February, 1998 |
Volute Dewatering Press accredited to "Inducement of New Technology" by Japan Sewage Works Agency (Model ES-201,202) |
| March, 1998 |
Cooperative Research Report on "Direct Dewatering of Sludge from Oxidation Ditch" issued by Japan Sewage Works Agency. Order of 6 MS Model units received from Japan Sewage Works Agency. |
| March, 1999 |
Limited number of "Inducement of New Technology" released ; Model ES-203~205 approved for use |
| July, 2000 |
Broke the 300th installation record |
| March, 2001 |
ISO9001 certification acquired (Volute Division) |
| April, 2001 |
Beginning to sell Volute Dewatering Press "EC Series" |
| October, 2002 |
Capital Increased to 80,000,000 yen |
| April, 2003 |
Beginning to sell Dryers "SP/SL series" |
| September, 2003 |
Broke the 500th installation record |
| November, 2003 |
Beginning to sell Twin Volute Dewatering Press"TV Series" |
| January, 2004 |
The Yokohama headquarter building established |
| September, 2004 |
Volute Dewatering Press nominated for "Aquatech Amsterdam 2004 Innovation Award" |
| October, 2004 |
Beginning to sell Volute Dewatering Press "Model ES Series" |
| September, 2006 |
Broke the 800th installation record |
| October, 2006 |
US-based subsidiary "AMCON NA, INC."established |
| March, 2007 |
China-based subsidiary "Angikang（Yixing）Environmental Protection Scientific Technology Ltd." established |
