| November 1943 | Amid WWII industrial consolidation, several small companies merged to establish Nagaoka Screw Works in Ōshima-shimmachi, Nagaoka City (capital: ¥500,000), designated as a Maizuru Naval Arsenal factory producing precision screws |
| August 1945 | Transitioned to civilian production, manufacturing and selling precision bolts, nuts, and small screws . |
| October 1953 | Renamed to Nagaoka Seisakusho Co., Ltd. .
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| December 1959 | Capital increased to ¥25 million . |
| September 1970 | Capital increased to ¥45 million . |
| June 1974 | Relocated head office and factory to the Nagaoka Industrial Park (supported by the Small & Medium Enterprises Promotion Fund) |
| January 1980 | Became certified by ClassNK (Nippon Kaiji Kyokai) |
| January 1980 | Expanded cold-forging plant at the Nagaoka factory |
| November 1980 | Opened the Tokyo (Urayasu) sales office in Chiba Prefecture . |
| June 1991 | Expanded inspection room and warehouse at the head factory |
| May 1998 | Introduced a 3D measuring machine . |
| March 2003 | Sold factory land in Shibayama Industrial Park, Chiba . |
| October 2004 | No damage to factory or equipment during the Niigata Chuetsu earthquake . |
| 2005 | Installed CNC lathes, Y-axis machining lathes, roundness testers. |
| 2006 | horizontal machining centers, NC cylindrical grinders, and deburring machines . |
| July 2007 | No damage during the Niigata Chuetsu Offshore earthquake . |
| 2008 | Added NC lathes, horizontal machining centers, and 100-ton cold-forging press . |
| August 2009 | Achieved ISO 14001 Environmental Management certification |
| 2010 | Introduced CNC and twin-axis CNC lathes . |
| 2011 | Replaced projection measuring machine, contour measuring instrument, and horizontal machining center . |
| March 2011 | Unaffected production lines during the Great East Japan |
| July 2011 | Earthquake and Niigata–Fukushima heavy rain event . |
| February 2012 | Achieved ISO 9001 Quality Management certification |
| November 2013 | Marked the 70th anniversary . |
| September 2015 | Relocated the Tokyo sales office |
| April 2021 | Daisuke Tsuchida appointed as President & CEO . |
| December 2022 | Upgraded the 3D measuring machine with a Tokyo Seimitsu unit . |
| November 2023 | Celebrated the 80th anniversary . |
