|1937||Established Kyowa Research Laboratories.|
|1942||Kyowa Kagaku Kogyo Co., Ltd., the forerunner of Kyowa Sangyo Co., Ltd. and which oversees Kyowa Research Laboratories, began research into industrialization of Butyl alcohol.|
|1948||Kyowa Sangyo Co., Ltd., the forerunner of Kyowa Hakko Kogyo Co., Ltd., began Japan’s first mass production of Acetone and Butyl alcohol from syrup using fermentation.|
Established Kyowa Hakko Kogyo Co., Ltd.
|1961||Established Daikyowa Sekiyu Kagaku Co., Ltd. as a joint venture with Daikyo Sekiyu. Kyowa Hakko Kogyo Co., Ltd. converts to petrochemical manufacturing methods.|
Completion of the Yokkaichi Plant Umaokoshi Plant for Daikyowa Sekiyu Kagaku Co., Ltd.
|1966||Established Kyowa Yuka Co., Ltd. (A subsidiary chemical manufacturer of Kyowa Hakko Kogyo Co., Ltd. Separated the Derivative Department of Daikyowa Sekiyu Kagaku Co., Ltd.)|
Completion of the Yokkaichi Plant Kasumigaura Plant.
|1988||Established Japan Oxocol Co., Ltd. as a subsidiary chemical manufacturer of Kyowa Hakko Kogyo Co., Ltd. Switched to a two plant system, consisting of the Chiba and Yokkaichi Plants.|
|1989||The Yokkaichi Plant receives the MITI* Minister's Award for Excellent Energy Conservation Plant and Building.
*MITI=Ministry of International Trade and Industry (currently the Ministry of Economy, Trade and Industry)
|1991||Merged Kyowa Yuka Co., Ltd. and Japan Oxocol Co., Ltd.|
The Chiba Plant receives ISO 9002 certification.
The Yokkaichi Plant receives ISO 9002 certification.
|2000||Established J-Plus Co., Ltd., as a joint venture with Mitsubishi Chemical Corporation.
The Yokkaichi Plant and Chiba Plant both receive ISO 14001 certification.
The Yokkaichi Plant receives a commendation (Award of Excellence) from the Minister of Health, Labor and Welfare.
The Yokkaichi Plant receives certification for longest accident-free period in the organic chemical industry.
|2003||Established Japan Ethyl Acetate Co., Ltd., as a joint venture with Showa Denko K.K.
The Yokkaichi Plant and Chiba Plant switch certification from ISO 9002 to ISO 9001:2000.
|2004||Name changed to Kyowa Hakko Chemical Co., Ltd. through joint investment of the Chemical Department of Kyowa Hakko Co., Ltd. and Kyowa Yuka Co., Ltd.|
|2007||The Chiba Plant received a commendation from the Minister of Land, Infrastructure, Transport and Tourism for its distinguished maritime-related service on Marine Day.|
|2008||The Yokkaichi Plant extended its accident-free record (23.95 million hours as of October, 2008) to remain as leaders in the organic chemical industry.|
|2010||Established KJ Holdings Co., Ltd|
|2011||Spun off from Kyowa Hakko Kirin Group as an independent entity under Japan Industrial Partners, Inc.
Merged Kyowa Hakko Chemical Co., Ltd. and KJ Holdings Co., Ltd.
|2012||Name changed to KH Neochem Co., Ltd.|
Established Taiwan-Japan Oxo Chemical Industries Inc. as a joint venture with CPC Corporation,
Listed on the First Section of the Tokyo Stock Exchange