|Feb, 1962||Original corporate establishment as Yusei Kikou Co., Ltd. Established（ headquartered in Osaka） w/ capital of 1.5 million yen|
|Mar, 1968||Corporate name changed to Sumisho Kiki Hanbai Co., Ltd.|
|Apr, 1968||Increase in capital to 30 million yen|
|Nov, 1968||Opening of Tokyo Branch Office（ Current headquarters）|
|Dec, 1968||Increase in capital to 50 million yen|
|Aug, 1973||Corporate name changed to Sumisho Kiden Hanbai Co., Ltd.|
|Apr, 1977||Merger with Sumisho Kenki Hanbai Service Co., Ltd. and increase in capital to 60 million yen|
|Oct, 1980||Increase in capital to 100 million yen|
|Oct, 1981||Increase in capital to 300 million yen|
|Oct, 1983||Increase in capital to 450 million yen|
|Oct, 1993||Established Sumisho Machinex Kyushu Co., Ltd.|
|Apr, 1994||Established Sumisho Machinex Chubu Co., Ltd.
Transferred Nagoya Branch business to new company
|Jan, 1995||Established Sumisho Machinex Hokkaido Co., Ltd.|
|Apr, 1995||Transferred Hokkaido Branch business ot new company|
|Apr, 1997||Transferred Osaka Branch, Tohoku Branch, Kobe Branch businesses to the above new companies Corporate name changed to Sumisho Machinex Co., Ltd.|
|Apr, 2004||Sumisho Machinex Chubu Co., Ltd. changed corporate name to Sumitomo Shoji Machinex Chubu Co., Ltd.
Sumisho Machinex Kansai Co., Ltd. and Sumisho Machinex Kobe Co., Ltd. merged and changed corporate name to Sumitomo Shoji Machinex Kansai Co., Ltd.
|May, 2004||Corporate headquarters moved to Harumi, Chuo-ku, Tokyo & corporate name changed to Sumitomo Shoji Machinex Co.,Ltd.|
|Apr, 2009||Merger with Sumitomo Shoji Machinex Kansai Co., Ltd. and Sumitomo Shoji Machinex Chubu Co., Ltd.and increase in capital to 1.165 billion yen.|
|Oct, 2018||Corporate headquaters moved to Hitotsubashi, Chiyoda-ku|
|Jul, 2019||Increase in capital to 5.3 billion yen|