1968          Company foundation in Osaka
1980          Expanded into construction business
1983          Opened Kyoto branch
1993          Opened Shiga factory and branch
1996          Merged with Kaneko Manufacturing Company in Hiroshima and established as ORIENTHOUSE

                   Opened Hiroshima branch
1997          Opened Okayama branch

1998          Opened Fukuoka branch

2001          Opened Nagoya branch

2007          Joined Japan Prefabricated Construction Suppliers and Manufacturers Association

2010          Opened Kobe branch

2011          Opened Fukushima branch

2012          Moved headquarters from Osaka to Kyoto

                   Started solar cell system sales as FC member of Kyocera

2014          Opened Tokyo branch