| 1948 | April | Company established. (Starts manufacturing and selling industrial chemicals and ammonia) |
|---|---|---|
| 1952 | July | Sumitomo Chemical Co., Ltd participates in our management. Asahi Chemical starts to manufacture new products, such as IBIT (Acid corrosion inhibitor). |
| 1956 | July | ASAHI Chemical moves its headquarters to Osaka, Nishi-ku. |
| 1958 | March | ASAHI Chemical acquires land for its Shigino Works. |
| 1959 | October | ASAHI Chemical starts manufacturing aluminate sulfate solutions. |
| 1964 | October | ASAHI Chemical inaugurates its Tokyo offices in Tokyo, Chuo-ku, Kanda. |
| 1968 | October | ASAHI Chemical acquires land for its Hirakata Works. ASAHI Chemical builds its Tokushima Works and starts manufacturing aluminate sulfate solutions. |
| 1969 | May | ASAHI Chemical starts manufacturing poly aluminum chloride in its Shigino Works. |
| October | ASAHI Chemical builds its Yonago Works and starts manufacturing aluminate sulfate solutions. | |
| December | ASAHI Chemical builds its Toyama Works and starts manufacturing sodium aluminates. | |
| 1975 | October | ASAHI Chemical builds its Nichinan Works and starts manufacturing aluminate sulfate solutions. |
| 1978 | February | ASAHI Chemical starts manufacturing and selling ASAFINE. |
| 1981 | February | ASAHI Chemical acquires JIS manufacturing qualification for the production of poly aluminum chloride at its Shigino Works. |
| 1985 | November | ASAHI Chemical begins to manufacture and sell SUMICERAM. |
| 1992 | February | ASAHI Chemical acquires JIS manufacturing qualification for the production of aluminate sulfate solutions at its Shigino Works |
| July | ASAHI Chemical exports its manufacturing technology for poly aluminum chloride to Thailand. | |
| 1995 | October | ASAHI Chemical starts manufacturing chlorate. |
| 1998 | April | ASAHI Chemical acquires its Nihama Works and starts manufacturing and selling LUXELEN. |
| 2000 | July | ASAHI Chemical acquires 3 works in Shirao, Iwanuma and Fuji respectively and starts manufacturing aluminate sulfate solutions, sodium aluminate solutions and paper processing resin. ASAHI Chemical acquires the ISO9002 certification. |
| 2003 | April | Sumitomo Chemical assigns the production of inorganic flocculents to ASAHI Chemical. (Integrated production, sales and research operations.) |
| July | ASAHI Chemical moves its Shigino and Hirakata Works inside the Osaka Works of Sumitomo Chemical. ASAHI Chemical moves its poly aluminum chloride manufacturing facilities inside the Ehime Works of Sumitomo Chemical. |
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| 2004 | April | ASAHI Chemical moves its headquarters to their present location in the Sumika Fudosan Yokobori Building. |
| 2006 | February | ASAHI Chemical acquires the ISO14001 certification. |
| 2010 | March | ASAHI Chemical acquires business of Bond-X products, heat-resistant adhesives and paints, from Nissan Chemical Industries, Ltd. |