|1978||Earth Environmental Service Co., Ltd. established in Osaka (capital; 12 million JPY).|
|1985||Increased the capital to 80 million JPY.|
|1988||Started mutual interaction with Vanderbilt University hospital about prevention technologies of nosocomial infection.|
|1989||Increased the capital to 176 million JPY founded by Earth Chemical Co., Ltd. and Otsuka Pharmaceutical Co., Ltd.|
|1990||Started mutual interaction with Stanford University hospital about prevention technologies of nosocomial infection.|
|1995||Gained certification from Japan Health Enterprise Foundation.|
|1996||Registered ESCO 641 (light trap with a soundwave generator) as patents.|
|1997||Gained certification ISO 9001 (Development Div.).|
|1999||Registered ESCO BR System(Bird repellent system by electric shock with a solar system) as patents.|
|2000||Gained certification ISO 14001 (Headquarters).|
|2001||Annual sales reached 10 billion JPY.|
|2003||Became one of the designated institution for Voluntary Food Sanitary Authorization system of Tokyo, Japan.|
|2005||Headquarters was moved to Tokyo from Osaka.|
|2006||Increased the capital to 296 million JPY.|
|2007||Annual sales reached 15 billion JPY.|
|2009||-Gained certification ISO/IEC 17025 (Comprehensive Center for Assay and Analysis).
-Gained trademark registration about Rapicom (Rapidly detect a Contaminated Origin by Microflora).
|2012||Gained certification ISO/IEC 27001 (All branch offices).|
|2015年||Annual sales reached 20 billion JPY.|
– Saito Research and Training Institute established.
– Shanghai Earth Environmental Service Co., Ltd. established in Shanghai, China.
– Earth Environmental Service (Thailand) Co., Ltd. and ARS Environmental Service (Thailand) Co., Ltd. established in Bangkok, Thailand.
|2019||Earth Environmental Service Co., Ltd. Taiwan Branch established in Taiwan.|
|2020||Earth Environmental Service Vietnam Co., Ltd established in Vietnam.|