| 1926 | Established INOUE RUBBER CO., LTD. in Atsuta-ku Nagoya City Started production of inner tubes and tires for bicycles |
| 1938 | Established INOUE RUBBER INDUSTORY CO., LTD. Started production of industrial rubber products (molding, extrusion) |
| 1954 | Concluded technology support contract with Bayer AG in Germany and established MTP KASEI CO., LTD. |
| 1955 | Started Japan’s first polyurethane foam production |
| 1959 | Started Color Foam mattress sales |
| 1960 | Automobile interior articles using polyurethane foam were first introduced in Japan |
| 1980 | Established INOUE MTP CO., LTD. by merging the industrial rubber and plastic sections of INOUE RUBBER INDUSTORY CO., LTD. and MTP KASEI CO., LTD. |
| 1990 | Renamed INOUE MTP CO., LTD. as INOAC CORPORATION |
| 1994 | Integrated living and consumer goods sales sections in the group established INOAC LIVING CO., LTD. as a new comprehensive planning and wholesale company. |
| 1997 | Started developing care equipment |
| 2005 | AEROFLOW, the original bedding brand, was born |
| 2014 | Smile, the nursing care brand, was born |
| 2015 | Held the Polyurethane International Forum to mark the 60th anniversary of starting urethane production |