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| 1973 | Launched muscle relaxant Muscalm tablets. |
|---|---|
| 1974 | Closure of the Kiyama plant. |
| 1976 | Founded Petrokimia Kayaku Company (agrochemical company) in Indonesia. Closure of the Iwamizawa plant. |
| 1977 | Established Kowa Sangyo Co., Ltd. Closure of the Orio plant. |
| 1978 | Moved the Fukuyama plant to the Minoshima region and commenced operations (migration completed in February 1986). |