Key Events
| Oct 1967 |
Toho Pipe Engineering Co., Ltd. (capitalized at \7 million) was founded as an LP gas system installation company, integrating the piping departments of Toho Liquefied Fuel (present Toho Liquefied Gas Co., Ltd.). 
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|---|---|
| Nov 1968 | Authorized as a designated company by Toho Gas Co., Ltd. |
| Dec 1971 | Capital increased to \15 million. |
| Jan 1977 |
Construction site office opened at the Gokiso Mukaeda site of Toho Gas Co., Ltd. (present 5-chome, Kanayama, Naka-ku, Nagoya). 
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| Jan 1982 | Provided leakage repair services on a contract basis for Toho Gas Co., Ltd. |
| Apr 1983 | Authorized as a gas pipework installation company by Asahi Kasei Homes Corporation. |
| May 1990 | Obtained a special construction business license. |
| Jan 1991 Apr |
Company name changed to Toho Pipe Engineering Co., Ltd. Capital increased to \45 million. |
| Aug 1993 | Obtained approval and permit for welding method (Agency for Natural Resources and Energy No. 5-10050). |
| May 1994 Nov |
Authorized as a designated installation business by Nagoya City Waterworks & Sewerage Bureau (license no. 624) New Head Office completed. |
| Jan 1995 | Aided gas recovery after the Great Hanshin Earthquake (1,800 man-days). |
| Mar 1998 | Commenced using a trenchless method (ECOCAT method) on mains. |
| Mar 1999 | Commenced using a trenchless method (Pipe Splitter method) on branches. |
| Sep 2000 Oct Nov |
Aided recovery from the flood disaster in Tokai (662 man-days) Authorized as a gas appliance dealer and a gas installation shop for newly built apartments by Toho Gas Co., Ltd. Fukue Office opened at 3 Fukue, Showa-ku, Nagoya as a business site of the main and branch installation department. |
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| Jul 2002 | Commenced using the short-distance jacking method for mains. |
| Mar 2003 | Environmental Action Guidelines formulated. |
| Jul 2004 | Commenced medium-pressure welded steel pipeline installation work. |
| Oct 2005 |
Merged with Tokai Paving Co., Ltd. and Gas Piping Mie Co., Ltd. to become Toho Gas Techno Co., Ltd.  |
| Jul 2007 | Aided gas recovery after the Chuetsu Offshore Earthquake in Niigata Prefecture (376 man-days) |
| Sep 2008 | Commenced operating the Construction Occupational Health and Safety Management System (COHSMS). |
| Mar 2011 | Aided gas recovery after the Great East Japan Earthquake (756 man-days) |
| Jun 2012 | Transferred the plied timber business to Taiyu Kensetsu Co., Ltd. |
| Apr 2015 | Gifu office opened. |
| Apr 2016 | Mikawa office opened. |
| Apr 2016 | Aided gas recovery after the 2016 Kumamoto Earthquake (221 man-days) |
| Apr 2017 | The Gifu and Mikawa sales offices are upgraded to business offices for business expansion. |
| Oct 2017 | Marked the 50th anniversary of Toho Gas Techno’s foundation. |
| Apr 2018 Jun. |
Merged with Eco Life Co.,Ltd. Aided gas recovery after the 2018 Northern Osaka Earthquake (106 man-days). |
| Sep. 2021 Nov. |
Telecommunications work business was added to the special construction business license. Obtained Security Service Authorization from Aichi Prefectural Public Safety Commission (No. 54001438) |
| Jan. 2022 | Took over the gas pipeline business from Toho Gas Engineering Co., Ltd. Took over the supply safety and equipment security businesses from Toho Gas Safety Life Co., Ltd. Transferred the gas appliance dealer business and the house pipe business for household applications to Toho Gas Safety Life Co., Ltd. |
| Oct. 2022 | Kanazawa Office opened. |
