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Periods 1978 -1900 | Periods 1991 -2000 | Periods 2001 -Now  
   
1978 •  Goshu Kohsan Co., Ltd. is established with registered capital 400,000 baht and
   paid up capital of 100,000 baht.
•  Head office located at 403/19 Soi Surasena, Silom Road. Bangkok.
   
1979 •  Increase of paid up capital to 400,000 baht.
   
1980 •  Increase of capital to 800,000 baht.
•  Goshu Kohsan moves head office to 1091/49 Soi Charurat, New Petchaburi
   Road, Phayathai, Bangkok.
   
1987 •  Increase of capital to 2,000,000 baht and paid up capital to 1,400,000 baht.
   
1988 •  Increase of capital to 20,000,000 baht and paid up capital to 6,000,000 baht.
•  Goshu Kohsan moves head office to 70 Moo 5 Kingkaew Road, Bangphli,
   Samutprakarn to prepare for future expansion.
   
1989 •  Goshu Chemical Co., Ltd. is established, a joint venture between
   Goshu Kohsan Co., Ltd. and Kurita Water Industries Ltd.
   
1990 •  GK-Kyowa (Thailand) Co., Ltd. is established, a joint venture between
   Goshu  Kohsan Co., Ltd. and Kyowa Kako Co., Ltd.