| 1937 |
Company was established as Takeda Clay Industries Co., Ltd.
Head office was established in Osaka, and operations were started in Mizusawa Plant. |
| 1944 |
Operations were started in Nakajo Plant. |
| 1946 |
Company name was changed to Mizusawa Industrial Chemicals, Ltd. |
| 1972 |
Wastewater treatment equipment was introduced at both plants. |
| 1984 |
Head office was transferred to Tokyo, and a sales office was established in Osaka. |
| 1992 |
Construction of a logistics center was completed. |
| 1994 |
Mizusawa Corporation, Ltd. was established to sell water purifying agents. |
| 1999 |
Capital was increased to 1.52 billion yen. |
| 2015 |
Shares were transferred from Takeda Pharmaceutical Company Limited to Osaka Gas Chemicals Co., Ltd. |
| 2017 |
Mizusawa Corporation, Ltd. was merged into the company. |
| 2023 |
Brought CHUO SILIKA CO., LTD. into the group. |
