

| 1926 | Established a production technology for the industrialization of acetic acid with acetylene, through joint research by four wood-vinegar-manufacturing companies. |
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| 1927 | Established Nippon Gohsei Kagaku Kenkyusho through the tie-up of the four manufacturing companies. Started construction on the Ogaki Plant in Ogaki city, Gifu Prefecture. |
| 1928 | Changed the company's name to the Nippon Synthetic Chemical Industry Co., Ltd., succeeded in industrialization of the first organic composition acetic acid in Japan, and in the following year, started construction on a hydration tower to greatly reinforce the capabilities of the company. |
| 1936 | Succeeded in the first production of vinyl acetate monomer (VAM) and vinyl acetate resin in Japan by use of acetylene method. |
| 1939 | Decided on a production base of acetone butanol (by consistency from carbide) in Uto city, Kumamoto Prefecture, and started construction of the Kumamoto Plant. |
| 1947 | Resumed research into producing VAM and the production of ethyl acetate in Ogaki. |
| 1949 | Started construction of a facility for VAM production at the Kumamoto Plant. Completed construction of GOHSENOL (polyvinyl alcohol: PVOH) production plant at the Ogaki Plant. |
| 1951 | Reinforced the GOHSENOL production equipment at both Ogaki and Kumamoto Plants. |
| 1958 | Invested in Taisei Kayaku Co., Ltd. |
| 1960 | Started production of glyoxal and ketene derivatives at the Ogaki Plant. Established Ogaki Kasei Kogyo Co., Ltd. (currently Ogaki Plant Motoima) under joint management, mainly for the manufacturing of downstream products. |
| 1963 | Cooperated with Mitsubishi Kasei Kogyo Co., Ltd. (currently Mitsubishi Chemical Corporation) for material conversion of petrochemicals and decided on proceeding to the Mizushima lndustrial Complex in Okayama Prefecture, established Mizushima Gohsei Kagaku Kogyo Co., Ltd. (currently Mizushima Plant.) under joint management, and in the following year, started the production of acetic acid and ethyl acetate with acetaldehyde. Consigned the production of Hi-Selon (water-soluble PVOH film) to Kansai Kagaku Kogyo Co., Ltd. |
| 1965 | Decided on financial participation in Kansai Kagaku Kogyo Co., Ltd. |
| 1967 | Started production of GOHSENOL at Mizushima Gohsei Kagaku Kogyo Co., Ltd. |
| 1969 | Developed the paint material resin GOHSELAC (unsaturated polyester) and started production of the product at the Ogaki Plant. Started production of VAM at Mizushima Gohsei Kagaku Kogyo Co., Ltd. |
| 1971 | Merged with Mizushima Gohsei Kagaku Kogyo Co., Ltd. Relocated the Central Research Laboratory to Ibaraki city, Osaka. |
| 1972 | Established Tokai Resin Co., Ltd. (currently Ogaki Plant Kamiya), and in the following year, started production of Hi-Selon. |
| 1975 | Started production of fine chemical products (pharmaceutical intermediates) at the Kumamoto Plant. |
| 1980 | Started production of BOVLON (bi-axially-oriented PVOH film) at the Kumamoto Plant. |
| 1984 | Started production of SOARNOL (ethylene vinyl alcohol copolymer resin) at the Mizushima Plant. |
| 1985 | Entered the optics and electronics material fields. Developed Dry Film Photoresist (DFR) and started production of DFR in Ogaki. |
| 1986 | Started development and production of imidazol. |
| 1987 | Established the U.S. sales office NIPPON GOHSEI (U.S.A.) Co., Ltd. |
| 1989 | Started production of SHIKOH, ultraviolet optics (ultraviolet ray and electronic line hardening type resin). |
| 1993 | Started production of polarizing film and retardation film at the Ogaki Plant. |
| 1994 | Planned the U.S. business development for SOARNOL and purchased a plant in Houston, Texas from E.I. DuPont Nemours & Company. Established NOLTEX L.L.C. under joint management. |
| 1996 | Established the North American sales company SOARUS L.L.C. for SOARNOL under joint management. Established NIPPON GOHSEI Europe GmbH as a European sales office. |
| 1997 | Transferred the DFR business to Nichigo-Morton Co., Ltd., under joint management with Morton lnternational Company (currently Rohm and Haas Company) in the U.S. Founded Processing-Technique Development Center at Mizushima. |
| 1998 | Ceased production of polarizing film and retardation film. |
| 2001 | Established NIPPON GOHSEI UK Ltd. for manufacturing SOARNOL. Established Nichigo Business Center Co., Ltd. by combining the administrative fields of Ogaki Plant and subsidiaries in Ogaki area. Started commercial operation of a multi-plant for highly-functional GOHSENOL. |
| 2003 | Started production of OPL film (optical polarized PVOH film, a key component of polarizing film for liquid crystal displays) at Ogaki. |
| 2004 | Started production of SOARNOL in the U.K. Acquired all shares in Clariant Polymer Co., Ltd. (Nichigo-Mowinyl Co., Ltd.) and made it a subsidiary. |
| 2005 | Merged with Ogaki Kasei Kogyo Co., Ltd. Founded Functional Film Development Center at Ogaki. |
| 2006 | Established NIPPON GOHSEI Shanghai Office in China. |
| 2008 | Started production of OPL film at Kumamoto. |
| 2009 | Merged with Nichigo-Mowinyl Co., Ltd. |
| 2010 | Established NICHIGO SHANGHAI Co., Ltd. in China. Established NIPPON GOHSEI (THAILAND) CO., LTD. in Bangkok, Thailand. |