| July 1963 |
Established waste oil collection business in Tokyo
|
|---|---|
| September 1970 | Established Taiyo Yuka Co. |
| October 1970 | Received Tokyo Metropolitan Industrial Waste Disposal License (collection, transportation, intermediate treatment) |
| June 1974 | Increased capital to 5 million yen |
| July 1975 | Factory relocated to Sanen, Itabashi-ku, Tokyo |
| December 1982 | Head office building completed |
| July, 1983 | Completed the oil-water separation facility at the waste oil reclamation plant |
| August 1989 | Sludge treatment facility completed |
| December, 2005 | Tokyo Metropolitan Government Special Control Industrial Waste Disposal License |
| June 1998 | Tokyo Metropolitan Government General Waste (human waste) Treatment Facility Installation Permit |
| October 2001 | Increased capital to 10 million yen and reorganized as a joint stock company. |
| August 2005 | ISO 14001 certification acquired |
| December 2007 | Licensed as a specially controlled industrial waste collector and transporter in Ibaraki Prefecture |
| August 2007 | Certified as a business operator for FRP inner lining installation of steel underground tanks |
| February 2008 | Licensed by Tokyo Metropolitan Government for industrial waste storage and transshipment facilities |
| August 2008 | ISO 14001 renewal |
| February 2011 | Obtained Industrial Waste Professional |
| February 2011 | Change of industrial waste permit (increase in processing capacity) |
| October 2011 | Miyagi Industrial Waste、Specially Controlled Industrial Waste Collection and Transportation License Fukushima Industrial Waste、Specially Controlled Industrial Waste Collection and Transportation License、 Licensed as a specially controlled industrial waste collector and transporter in Ibaraki Prefecture Change of industrial waste permit(additional items to be processed, increased throughput) |
| 平成November 2011 |
Matsumoto Electric Co., Ltd. is now a member of the Solterra Group
|
| July 2012 | Increased capital to 30 million yen |
| August 2012 | Change of industrial waste permit (addition of cutting and compressed packaging) |
| December 2012 | Obtained expert certification in industrial waste |
| January 2013 | Certified as an Excellent Industrial Waste Disposer by the Tokyo Metropolitan Government |
| February 2013 | BCP (Business Continuity Plan) Formulation |
| September 2013 | 50th anniversary |
| September 2014 | Nagano Industrial Waste、Specially Controlled Industrial Waste Collection and Transportation License |
| October, 2014 | Specially Controlled Industrial Waste Collection and Transportation License、Specially Controlled Industrial Waste Collection and Transportation License |
| January, 2015 | Addition of industrial waste permit (addition of enrichment and biological treatment) |
| March, 2015 | Taiyo Maintenance Corporation is now a member of the Solterra Group Additional industrial waste permits (increased treatment of concentrated and biological waste) |
| July, 2015 | PCB (low-concentration) collection and transportation business license added Addition of items permitted for specially controlled industrial waste collection and transportation (addition of low-concentration waste PCBs) |
| September, 2015 | Certified as an excellent industrial waste disposer by Shizuoka Prefecture (specially controlled industrial waste collection and transportation business) |
| February, 2016 | Solterra Construction Inc. is now a member of the Solterra Group |
| June, 2016 | Certified as excellent by Kanagawa Prefecture (industrial waste collectors and transporters) and Gunma Prefecture (industrial waste collectors and transporters) under the Excellent Industrial Waste Disposer Certification System |
| October, 2016 | Certified as an excellent industrial waste disposer under the Excellent Industrial Waste Disposer Certification System in Fukushima Prefecture (industrial waste collection and transportation business and specially controlled industrial waste collection and transportation business), Miyagi Prefecture (industrial waste collection and transportation business and specially controlled industrial waste collection and transportation business), and Tochigi Prefecture (industrial waste collection and transportation business). |
| March, 2009 | Recognized as an excellent industrial waste disposer by Tochigi Prefecture (specially controlled industrial waste collection and transportation business), Asahi Small and Medium Business Management Information Center, Inc. |
| August, 2008 | Sanko Enterprises, Inc. is now a member of the Solterra Group |
| October 2028 | Tokyo 8" wins Jury Award at the Itabashi Product Technology Awards 2019 Obtained certification as an excellent industrial waste processor in Tokyo and 12 prefectures. |
| January 2020 | Launch of Solterra Holdings Co. |
| May 2020 | Solterra Farms Inc. is now a member of the Solterra Group |
| July 2020 | ISO 14001 renewal |
| March 2021 | SAKAMOTO IRON WORKS CONSTRUCTION Co., Ltd. is now a member of the Solterra Group |
| July 2021 | Shinozaki Corporation is now a member of the Solterra Group |
| February 2022 | TOKYO8 GLOBAL Inc. is now a member of the Solterra Group |
| March 2023 |
Received the "Deputy Director-General for SDGs Promotion (Minister of Foreign Affairs) Award" at the 6th Japan SDGs Awards
|
|
|
