| October 1950 | Machine factory in Sukenobu-cho (Hamamatsu) by Sadayoshi Sakurai(founder) mainly for processing automobile parts. |
| January 1953 | Reorganized into a joint-stock company |
| November 1953 | Reorganized into a stock company with a capital of 2 million JPY |
| March 1958 | Manufacturing of rotary milling machines commenced |
| October 1963 | Merger with Sakurai Seisakusho Co., Ltd. (Chuo-ku, Tokyo), reaching a capital of 50 million JPY. |
| December 1963 | Stocks registered on the Tokyo Stock Exchange (for OTC trading) 36,300 m2 of land acquired in Handa-cho, Hamamatsu City for factory site (current Funaoka Factory location) |
| August 1964 | Funaoka factory operation commenced |
| November 1968 | Acquired 2,962㎡ of land and factory in Hikima-cho, Hamamatsu City |
| March 1969 | Operation of the Hikima factory as a parts processing factory commenced |
| October 1970 | Capital increased to 100 million JPY |
| November 1970 | Machine tool manufacturing plant at Funaoka factory opened |
| July 1973 | 2,460m2 of land and factory in Haruno-cho, Shuchi-gun, Shizuoka Pref. (current Hamamatsu City) purchased Operations commenced |
| December 1974 | Started sales of warp pattern circular knitting machines |
| October 1980 | Started production of multi-axis head changing machine TURREX |
| January 1981 | Head office established in Sukenobu-cho, Hamamatsu City |
| December 1985 | Capital increased to 200.7 million JPY |
| July 1988 | Purchased 35,995m2 of land in Hosoe-cho industrial park in Inasa-gun (current Kita-ku, Hamamatsu City) , construction of a parts factory started. |
| March 1989 | Main factory moved (Sukenobu factory and Hikima factory) to Hosoe factory and operation commenced. |
| February 1992 | Funaoka factory expansion completed |
| February 1993 | Completion of new Hosoe Factory plant No. 2 |
| December 1993 | Closure of Haruno Factory and integration into Hosoe Factory |
| April 1999 | Head Office moved to Funaoka Factory site in Handacho, Hamamatsu City |
| September 1999 | ISO9001 certification acquired |
| March 2000 | Subsidiary SAKURAI U.S.A., CO. established in the United States |
| March 2001 | ISO14001 certification acquired |
| May 2002 | Subsidiary SAKURAI VIETNAM CO., LTD. established in Vietnam |
| December 2004 | OTC trade registration with the Japan Securities Dealers Association terminated. Shares listed on JASDAQ Securities Exchange (currently Tokyo Stock Exchange JASDAQ (Standard)) |
| July 2005 | New 896m2 Hosoe factory office for parts processing division completed |
| October 2005 | Subsidiary SAKURAI VIETNAM CO., LTD. Phase 2 factory (4,500m2) completed |
| March 2007 | Expansion of Hosoe Plant No. 2 completed |
| September 2013 | Subsidiary SAKURAI (THAILAND) LTD. in Thailand established |
| November 2014 | JISQ9100 certification acquired |
| July 2017 | Liquidation of subsidiary SAKURAI (THAILAND) LTD. |
| July 2018 | Completion of construction of Hosoe Plant No. 3, Parts Processing Division |
| August 2018 | Capital decreased to 100 million JPY |
| October 2020 | Sakurai Seisakusho 70th anniversary celebrated |