| 1915 |
Establishment of OSAKA SODA CO., LTD. with capital of \750,000 in Osaka for the manufacture and sale of caustic soda |
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| 1917 | Opening of Kokura Plant in Kita-Kyushu, Fukuoka |
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| 1931 | Opening of Amagasaki Plant in Amagasaki City, Hyogo |
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| 1948 | Opening of Tokyo Branch |
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| 1949 |
Listed on the First Section of the Osaka Stock Exchange |
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| 1952 | Opening of Matsuyama Plant in Matsuyama City, Ehime |
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| 1953 |
Listed on the First Section of the Tokyo Stock Exchange |
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| 1956 | Establishment of DAISO TRADING CO., LTD. |
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| 1961 | Opening of Research Center in Amagasaki City, Hyogo |
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| 1962 |
Started production of diallyl phthalate resin |
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1968 |
Establishment of OKAYAMA CHEMICAL CO., LTD. jointly founded by Asahi Chemical Industry Co., Ltd. (currently Asahi Kasei Corporation) |
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| 1970 |
Establishment of DAISO ORGANICS CO., LTD. |
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| 1971 |
Started production of allyl chloride and epichlorohydrin |
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1975 |
Establishment of DAISO ENGINEERING CO., LTD. |
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| 1978 |
Started production of allyl glycidyl ether |
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| 1979 |
Started production of epichlorohydrin rubber |
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| 1988 | Changing the company name from OSAKA SODA CO., LTD. to DAISO CO., LTD. |
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| 1992 |
Started production of silica gel for liquid chromatography |
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| 2001 |
Started production of polysulfide silane coupling agent CABRUS™ |
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| 2002 | Conversion of Chori Chemical Co., Ltd. to a subsidiary;Changing the company name to DAISO CHEMICAL CO., LTD. |
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| 2003 | Merger of DAISO TRADING CO., LTD. and DAISO CHEMICAL CO., LTD. to form newly DAISO CHEMICAL CO., LTD. |
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| 2005 | Establishment of DAISO CHEMICAL (Shanghai) CO. LTD. a subsidiary of DAISO CHEMICAL CO., LTD. |
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2006 |
Establishment of DS WELLFOODS CO., LTD. |
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| 2008 |
Establishment of DAISO Fine Chem GmbH |
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| 2010 |
Acquisition of Food & Bio Research Center, Inc. |
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2012 |
Termination of the joint venture with Asahi Kasei Chemicals Corporation(currently Asahi Kasei Corporation) OKAYAMA CHEMICAL CO., LTD. is transformed to a wholly owned subsidiary of DAISO CO., LTD. |
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| 2015 |
Changing the company name from DAISO CO., LTD. to OSAKA SODA CO., LTD. |
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2016 |
Merger of DAISO CHEMICAL CO., LTD. with IMPEX CORPORATION |
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2017 |
Started production of acrylic rubber Conversion of SHISEIDO IRICA TECHNOLOGY INC. to a subsidiary, changed the company name to SANYO FINE IRICA TECHNOLOGY CO.，LTD. Establishment of SANYO FINE TRADING CO., LTD. |
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2018 |
Started production of non-phthalate allyl resin |
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2021 |
Merger of OKAYAMA CHEMICAL CO., LTD. into OSAKA SODA as Okayama Plant Moved Kokura Plant and changed the plant name to Kitakyushu Plant |
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