| April 1st, 2023 | Osaka Sales Office established in Ikuno Ward, Osaka City, Osaka Prefecture. |
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| March 31st, 2021 | Design Office moved to Tokyo Sales Office. |
| April 1st, 2019 | Model changed from ESD Series 'Separate Type ESD40 II Model' to 'Separate Type ESD40 III Model'. |
| April 1st, 2019 | Tokyo Sales Office established in Sumida Ward, Tokyo Prefecture. Niigata Sales Office established in Joetsu City, Niigata Prefecture. |
| July 22th, 2018 | Matsuyama Sales Office closed down. |
| January 22nd, 2018 | Model changed from ESD Series 'Separate Type ESD210 Model' to 'Separate Type ESD210 II Model'. |
| March 31st, 2016 | In order to meet a wider variety of customer's needs, we have opened an English version of our corporate site. |
| December 21st, 2015 | In order to make it easier to use and improve page composition and site design, we have given our corporate site a complete overhaul. |
| September 1st, 2015 | Our ESD series 'Separate Type ESD150 Model' is now being made and sold. |
| April 26th, 2013 | Our spring drill boring system has been registered with the Ministry of Land, Infrastructure, Transport and Tourism's new technology information system (NETIS) (Registration No. SK-130007-A) |
| March 31st, 2013 | Our ESD series 'Crawler Type ESDC11 Model' is now being made and sold. |