| 1926 | Founded by late Jiro Kusumoto |
|---|---|
| 1948 | Incorporated and named Kusumoto & Co. as a distributor of chemical products |
| 1956 | Started manufacturing paint additives (DISPARLON) |
| 1962 | Reorganized as Kusumoto Inc. Constructed Koshigaya Plant and started its operation |
| 1972 | Established Kusumoto Chemicals, Ltd. with an investment stake of 100% from Kusumoto & Co., Ltd. Separated and took over sales and Manufacturing section of Kusumoto Chemicals, Ltd. Constructed Soka laboratory and started its operation |
| 1973 | Entered the environmental testing business and established ETAC brand started manufacture and sale of environmental test chambers (ETAC) |
| 1979 | Constructed Soka plant and started its operation |
| 1983 | Constructed new Laboratory at Soka-city |
| 1996 | Constructed Kashima plant and started its operation |
| 2000 | Additive division acquired ISO9001 certification ETAC division acquired IECQ certification |
| 2001 | ETAC division acquired ISO9001 certification |
| 2003 | Constructed Kusumoto Chemicals (Kunshan) Co., Ltd. and started its operation |
| 2006 | Opened Mizunami Laboratory Established Kusumoto Chemicals (Shanghai) Co., Ltd. |
| 2007 | Established Kusumoto Chemicals（India) Pvt. Ltd. |
| 2014 | Completed New Kusumoto Bldg. |
| 2016 | Established Kusumoto Chemicals (Thailand) Co., Ltd. Constructed new Koshigaya Plant Office |
| 2017 | Constructed Saitama warehouse and started its operation |
| 2019 | Soka Second plant started operation |
