Dec 2012 : Design and construction for mobile base station construction started
Feb 2014 : Design for asbestos removal work started
Jul 2015 : Design and construction for Civil engineering and Electrical work
　            (Including demolition work)
Oct 2015 : Incorporated as Welltech Co., Ltd.
                (Capital 3 million yen, Joto-ku, Osaka City)
Jan 2016 : Established a work site in the East Japan area
                (Kanagawa-ku, Yokohama-shi)
Feb 2017 : Opened South Osaka Sales Office
                (Kashiwara City, Osaka Prefecture)
Mar 2018 : Increased capital to 10 million yen
Dec 2018 : Relocation of head office
                (Higashinari-ku, Osaka City)

Jan 2019 : Participation in overseas business started
                (5 airports in Nepal)
Apr 2020 : Established of Salesoffice in Nepal
                (New Baneshwor Nepal)