| January 1972 | Mitsubishi Gas Chemical Company, Inc. established a new unsaturated polyester resin plant in Hiratsuka City, Kanagawa Prefecture. |
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| February 1973 | Toyobo Co., Ltd. established a new unsaturated polyester resin plant in Inuyama City, Aichi Prefecture. |
| October 1977 | Mitsubishi Gas Chemical Company, Inc. and Toyobo Co., Ltd. merged their unsaturated polyester resin sales divisions and formed Japan U-Pica Company Ltd. The respective manufacturing divisions were established as independent companies Hiratsuka U-Pica Company and Inuyama U-Pica Company. |
| April 1982 | Acquired unsaturated polyester resin division from Mitsubishi Petrochemical Co., Ltd. (currently Mitsubishi Chemical Corporation), and integrated it into Japan U-Pica Company Ltd. |
| September 1982 | Started doing business in powder coating resins (manufacturing at Inuyama U-Pica Company). |
| December 1986 | Started doing business in methacrylic esters, built production facility for the same at Hiratsuka U-Pica Company. |
| April 1988 | Japan Premix Company was established for the production of sheet molding compound (SMC) in Kani-gun, Gifu Prefecture. |
| August 1990 | Mine Factory newly built in Mine City, Yamaguchi Prefecture for the production of unsaturated polyester resins and powder coating resins. |
| April 1991 | Japan U-Pica acquired both Hiratsuka U-Pica and Inuyama U-Pica. Hiratsuka U-Pica named Shonan Factory and Inuyama U-Pica named Inuyama Factory. |
| April 1993 | Technology and facilities transferred from Toyobo Co., Ltd. started doing business in polyester dry-type molding compounds. |
| October 1993 | New laboratory building built in Hiratsuka City, Kanagawa Prefecture. |
| November 1994 | Publicly offered company stock by over-the-counter trading. |
| March 1996 | Expanded unsaturated polyester resin and powder coating resin production capacity at Mine Factory and added a new line for methacrylic esters at same factory. |
| June 2000 | Expanded methacrylic ester production capacity at Mine Factory. |
| June 2000 | Acquired ISO 9002 certification for Mine Factory. |
| October 2001 | Acquired ISO 14001 certification for Mine Factory. |
| June 2003 | Acquired ISO 9001:2000 certification for Shonan Factory, Mine Factory, and Technical Research Center. |
| August 2007 | Established joint-venture company U-Pica Resin (Changshu) Co., Ltd. in China. |
| August 2010 | Acquired Biomass Mark certification for BIOMUP®, an unsaturated polyester resin derived from biomass-materials. |
| October 2014 | Launched sales of CBZ®, a thermosetting resin for carbon fiber-reinforced plastics. |
| January 2018 | Concluded licensing agreement for CBZ with ARMA Architectural Materials Srl in Italy. |
| March 2020 | Mitsubishi Gas Chemical Company, Inc. conducted TOB for the Company's shares. |
| July 2020 | Delisted from Tokyo Stock Exchange's JASDAQ Standard section. |
| October 2022 | Terminated production and sales by U-Pica Resin (Changshu) Co., Ltd. |
| March 2023 | Mitsubishi Gas Chemical Company, Inc. acquired all shares of the Company held by Toyobo Co., Ltd., making the Company a wholly-owned subsidiary. |
| November 2023 | Closed Kyushu Sales Office |
