This page can be viewed by scrolling.
| 1917 | Founded as Koei Pharmaceutical Co., Ltd. in Osaka and started to produce acetic acid (discontinued in 1930) |
|---|---|
| 1926 | Changed the company name to Koei Co., Ltd. |
| 1931 | Started to produce aceton and butanol by fermentation |
| 1934 | Started to produce formalin |
| 1950 | Started to produce m-aminophenol Changed the company name to Koei Chemical Co., Ltd. |
| 1952 | Started to produce pentaerythritol |
| 1959 | Started to produce trimethylolpropane and formit |
| 1962 | Started to produce amines |
| 1963 | "Inoue Award" for the production of pentaerythritol |
| 1964 | Started to produce pyridine bases |
| 1966 | Expanded the fine chemical facility for Amines |
| 1967 | "Okochi Memorial Production Prize" for the production of pyridine bases Opened Chiba Plant and started to produce pentaerythritol |
| 1971 | Started to produce formalin, trimethylolpropane, sodium hydrosulfite and amines in Chiba Plant |
| 1972 | Started to produce pyridine bases in Chiba Plant |
| 1980 | Started to produce chemical body warmers (discontinued in 1999) |
| 1982 | Construction of a multi-purpose plant and expanded the fine chemical facility for amines and pyridine bases |
| 1985 | Started to produce 2-cyanopyrazine |
| 1986 | Started to produce dlazep hydrochloride hydrate (discontinued in 2009) |
| 1987 | Certified as GLP by Ministry of International Trade and Industry |
| 1990 | "Industrial Technology Award" from the Osaka Industrial Research Association for development of "CASCON-RESIN (functional modified epoxy resins)" |
| 1991 | A new GMP plant opened and registered to FDA |
| 1992 | "Chemical Technology Award" from the Kinki Chemical Society of Japan for the development of an Anti-Ulcer Drug Intermediate "Technological Prize" from the Adhesion Society of Japan for epoxy resins adhesives |
| 1993 | Certified as GLP by Ministry of Labor |
| 1995 | Construction of a multi-purpose plant in Chiba Plant and started to produce intermediates for pharmaceuticals and agricultural chemicals |
| 1996 | Committed "Responsible Care" Certified to ISO-9002 Opened Düsseldorf liaison office (-2004) |
| 1997 | "Catalysis Society of Japan Award (Industrial Field)" for the synthesis of pyridine using a zeolite catalyst Listed on the 2nd Section of the Osaka Securities Exchange Construction of a multi-purpose vapor-phase plant in Chiba Plant |
| 1998 | "Chemical Technology Prize" from the Kinki Chemical Society of Japan for the new synthetic method of intermediate chloro nicotinyl insecticide |
| 1999 | Certified to ISO 14001 (Osaka Plant, Chiba Plant) Expanded the liquid-phase reaction plant Opened New York liaison office (-2003) |
| 2000 | Transferred paper and pulp related business to Asahi Chemical Co., Ltd. |
| 2002 | Certified to ISO 9001 (whole company) |
| 2003 | Relocated Head Office to Joto-ku, Osaka Adopted compliance system Certified to ISO 14001 (whole company) |
| 2004 | Started to dispatch our employee to Sumitomo Chemical Europe S.A./N.V. |
| 2006 | Relocated headquarters operations to Tokyo Office Expanded the liquid-phase reaction plant in Chiba Plant Expanded the vapor-phase reaction plant in Chiba Plant |
| 2010 | Opened a new laboratory in Chiba Plant and production and research functions centralized to Chiba Plant |
| 2013 | Relocated Tokyo Head Office to the present address |
| 2016 | Closedown of Osaka Plant and changed the registered address to Sodegaura-shi, Chiba |
| 2017 | Celebration the 100th anniversary Expanded the liquid-phase reaction plant |
| 2019 | Enhanced production capacity of the liquid-phase reaction plant |
