| 1961.10 | Tadao Aoki established Aoki Iron Works in Katae-Machi, Osaka City and started the business of processing Bridgestone tire components with Kansai BS. |
|---|---|
| 1965.09 | Started business with Hamaguchi Industry Co., Ltd. |
| 1968.03 | Relocated a factory to Kounoike, Higashi-Osaka City in response to expansion of business. |
| 1969.05 | Started business with Akahagi Flange Co., Ltd. |
| 1970.09 | Added new facilities in response to increase of demands. Relocated a factory to Kusune, Higashi-Osaka City. |
| 1972.02 | Started business with Toyo Mining Kosakusho. |
| 1976.07 | Started business with Fuso Mining Co., Ltd. |
| 1979.03 | Started business with Daikin Industries Ltd, Oil Hydraulics Division. |
| 1979.11 | Changed the name of Aoki Iron Works Co., Ltd. |
| 1982.04 | Started business with Daikin Industries Ltd, Robots Division. |
| 1986.09 | Started business with ShinMaywa Industries, Ltd, Aircraft Division. |
| 1989.05 | Started business with Matsushita Electric Devices Co., Ltd, FA Division. |
| 1990.02 | Started training in processing composite material. |
| 1990.12 | Received an order for production components of passenger jet aircraft, MD-11 and started production. |
| 1994.10 | Received an order for production components of passenger jet aircraft, B757 and B767 and started production. |
| 1995.03 | Started full production of aircraft components, relocated a Show Window factory to Takaida, Higashi-Osaka City, changed the name of Aoki Co., Ltd and Toyohiko Aoki was inaugurated as president. |
| 1995.04 | Started business with Mitsubishi Heavy Industries, Ltd, Mihara Machinery Works. |
| 1995.06 | Received an order for production components of passenger jet aircraft, B777 and started production. |
| 1996.09 | A clean room was completed and started full production of composite material. |
| 1997.01 | Recognized as the Boeing Company-certified factory. |
| 1998.03 | Introduced 3-dimensional CAM system “SATIS”. |
| 1998.10 | Started business with Daikin Industries Ltd, Chemicals Divison. |
| 1999.06 | Started business with Daikin Industries Ltd, Defense Systems Division. |
| 2000.08 | Started business with Sumitomo Precision Product Co., Ltd, Aerospace Business Unit. |
| 2001.07 | Received an order for prototype and production components of a crash boat, US-2 and started production. |
| 2002.07 | Higashi-Osaka Aerospace Exploration Council was established and Toyohiko Aoki was inaugurated as the first president. |
| 2002.09 | Co-developed, designed and produced T-POD of Tokyo University CUBESAT. |
| 2002.10 | Started production of a lead foundry machine and the die. |
| 2002.12 | SOHLA was established and Toyohiko Aoki was inaugurated as the first president. |
| 2003.06 | T-POD was launched and succeeded the detachment. |
| 2003.07 | Obtained ISO 9001:2000 certifiaition. |
| 2003.08 | Started research and development of magnesium cutting work technique. |
| 2003.12 | Introduced three-dimensional measuring machine produced by Mitsutoyo. |
| 2004.10 | Received an order for prototype and production components of a transport aircraft, C-X and started production. |
| 2005.02 | Toyohiko Aoki resigned the president of SOHLA. |
| 2005.03 | Started business with JAXA. |
| 2005.04 | Toyohiko Aoki was appointed as the Monodukuri goodwill ambassador for Higashi-Osaka. Received an order for prototype and production components of a fixed-wing patrol aircraft, P-X and started production. |
| 2005.09 | |
| 2006.03 | |
| 2006.10 | Received an order for prototype and production components of passenger jet aircraft, B787 and started production. |
| 2007.04 | Started business with ANA Aircraft Maintenance Co., Ltd. |
| 2007.10 | Obtained Nadcap certification from Performance Review Institute. |