| Oct. 1959 |
The petrochemical sector of Maruzen Oil (renamed to Cosmo Energy Holdings) Co.,Ltd. is separated as an independent unit and established with a capital investment of ¥2.5 billion(100% share)by Maruzen Oil Co.,Ltd. |
| Feb. 1964 |
Capital investments are received from Ube Industries Ltd. Chisso (renamed to JCN Corporation), Denki Kagaku
Kogyo K.K. (renamed to Denka Company Limited ), Nissan Chemical Industries,Ltd. and Nippon Soda Co.,Ltd. |
| Jun. 1964 |
Commencing commercial operation of No.1 Ethylene production Unit |
| Apr. 1966 |
Commencing commercial operation of No.2 Ethylene production Unit and the No.1 Aromatic Extraction Unit |
| Apr. 1969 |
Commencing commercial operation of No.3 Ethylene production Unit and No.2 Aromatic Extraction Unit |
| Aug. 1969 |
Establishment of Chiba Butadiene Industry Co., Ltd. as a joint venture for the production and the sale of butadiene |
| Apr. 1981 |
Establishment of Nissan Maruzen Polyethylene Co.,Ltd. as a joint venture for the production and the sale of high-density polyethylene(Jan. 1991:renamed to Maruzen Polymer Co.,Ltd.) |
| Jul. 1982 |
Commencing commercial operation of Petroleum Resin Production Unit |
| Sep. 1982 |
The petrochemical business, including Alcohol Ketone Production Unit, inherited from Maruzen Oil (renamed to Cosmo Energy Holdings) Co., Ltd. |
| Aug. 1983 |
Commencing commercial operation of Water-based solvent production Unit |
| Dec. 1984 |
Acquisition of Goi Chemical Co.,Ltd. stock from Maruzen Oil (renamed to Cosmo Energy Holdings) Co.,Ltd. |
| Oct. 1985 |
Establishment of Nisso Maruzen Chemical Co.,Ltd. as a joint venture for the production and the sale of ethylene oxide, ethylene glycol and other products |
| Mar. 1986 |
Commencing commercial operation of Polyparavinylphenol Production Unit |
| Jul. 1986 |
New York representative office is reorganized into Maruzen America Inc. established through 100% capital investment |
| Sep. 1987 |
Commencing commercial operation of Multi Hydrogenation Unit and High-purity dicyclopentadiene Production Unit |
| Apr. 1989 |
Commencing commercial operation of Benzene Production Unit |
| Dec. 1990 |
Establish the corporate brand "Chemiway" |
| Apr. 1991 |
Commencing commercial operation of No.2 Multi Hydrogenation Unit |
| Sep. 1991 |
Establishment of Keiyo Ethylene Co.,Ltd. for the production and the sale of ethylene, propylene and other products |
| Jun. 1993 |
Establishment of Keiyo Monomer Co.,Ltd. as a joint venture for the production and the sale of Vinyl chloride monomer |
| Dec. 1994 |
Commencing commercial operation of No.4 Ethylene Production Unit (Keiyo Ethylene Co. Ltd.) |
| Dec. 1997 |
ISO (International Organization for Standardization) 9002 certified |
| Aug. 1998 |
Commencing commercial operation of Vinyl Ｅther Production Unit |
| Aug. 1999 |
Commencing commercial operation of Hydrofluoroethane Production Unit |
| Nov. 1999 |
ISO14001 certified |
| Dec. 1999 |
Acquisition of Nisso Petrochemical Industries Co.,Ltd. shares from Nippon Soda Co.,Ltd. and Teijin Limited (renamed to Maruzen Chemical Co.,Ltd. in Oct. 2000) |
| Oct. 2004 |
Establishment of Ube Maruzen Polyethylene Co.,Ltd. as a joint venture for the production of Low-density polyethylene |
| Apr. 2005 |
Merger of Maruzen Polymer Co.,Ltd. and Maruzen Chemical Co.,Ltd. Establishment of CM Aroma Co.,Ltd. as a joint venture for the production and the sale of Mixed xylene |
| Dec. 2005 |
Setting up CSR committee |
| Jun. 2008 |
Revamp No.3 Ethylene Production Unit to enhance its international competitiveness |
