1961 Maeda Chemical Industry Co. merged with Asahi Chemical Industry Co. to establish Sankyo Kasei Co.Capital:30 millionCapital increase:50 million 1962 Sodium hydrosulfide plant completed (Akitsu Plant) 1964 Sodium sulfate plant completed (Mihara Plant) 1967 Crystal sodium sulfide plant No.1 completed (Akitsu Plant) 1969 Sodium hydrosulfide technical liquid plant (Kainan Work)Crystal sodium sulfide plant No.2, and sodium sulfide plant completed (Akitsu Plant) 1970 Capital increase:90 million 1...

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