| 1899 (Meiji 32) | Founding of the Sataro Imai factory as a weaving factory for striped fabrics |
| 1918 (Taisho 7) | Conversion to a towel weaving factory |
| 1943 (Showa 18) | As a result of wartime enterprise development, the company merged with other companies and continues as an excellent business |
| 1945 (Showa 20) | Imai Towel Factory was established as a stand-alone company after the dissolution of the joint venture |
| 1951 (Showa 26) | With the expansion of the business, the company was reorganized as a stock company and renamed Imai Towel Co. |
| 1960 (Showa 35) | Due to a sharp increase in orders, an adjoining site is acquired and a third factory is built |
| 1962 (Showa 37) | Expansion and renovation of the finishing plant to accommodate the increased number of products produced |
| 1989 (Heisei 1) | 1989 Construction of a new factory at the head office Shigeki Imai is appointed Chairman Tetsutaro Imai is appointed Representative Director |
| December 1989 (Heisei 1) | Construction of the second phase of the new head office factory |
| June 1991 (Heisei 3) | Abolition of old head office factory and transfer to new factory |
| January 1992 (Heisei 4) | ODA (Overseas Development Assistance) for trainees from China |
| February 1995 (Heisei 7) | Capital increased to 10,000,000 yen |
| January 2003 (Heisei 15) | Tetsutaro Imai appointed Chairman of the Board Hideki Imai appointed Representative Director |
| September 2004 (Heisei 16) | Opening of Fil+usine shop in Tomigaya, Shibuya Ward, Tokyo |
| January 2005 (Heisei 17) | Exhibition at Maison & Objet, France |
| April 2006 (Heisei 18) | Hideki Imai becomes Director of Shikoku Towel Industrial Association |
| October 2007 (Heisei 19) | Opening of ecute Tachikawa at JR East Tachikawa Station |
| March 2010 (Heisei 22) | Hideki Imai appointed Chairman of Shikoku Towel Youth Section |
| March 2014 (Heisei 26) | Exhibited at Maison & Objet Asia held at Marina Bay Centre, Singapore from March 10 to 13 |
| May 2014 (Heisei 26) | Fil+usine moves to Meguro Ward, Tokyo |
| July 2016 (Heisei 28) | Opening of Fil+usine gransta in gransta, Tokyo Station |
| July 2017 (Heisei 29) | Opening of Fil+usine Chofu PARCO |
| March 2018 (Heisei 30) | Tokyo office opened in Yoyogi, Shibuya Ward, Tokyo |
| October 2018 (Heisei 30) | Opening of Fil+usine Tomigaya in Tomigaya, Shibuya Ward, Tokyo |
| 2019 (Reiwa 1) | Establishment's 120th anniversary |
| 2021 (Reiwa 3) | Company 70th anniversary |
