November 1954	Founded in Osaki, Shinagawa Ward, Tokyo, as an electrical machinery manufacturer with a capital of 5 million yen Manufacture and sale of automatic engine starter panels and electric irons
September 1955	Transfer of the patent license for the engine starter panel to the Nippon Telegraph and Telephone Public Corporation (now NTT, Inc.)
September 1957	Part of the Nippon Electric Precision Instruments Co., Ltd. group
May 1958	Colorcon Completes Its First Domestic Model (Jointly Developed with Toyo Tsushinki Co., Ltd.)
January 1959	Relocation of Headquarters and Factory to Shimura-Nakadai-cho, Itabashi Ward, Tokyo
October 1960	Increased the capital stock to 10 million yen
April 1963	Relocated the headquarters and factory to Asakusa Kiyokawa-cho, Taito Ward, Tokyo
April 1964	Opening of the Osaka Branch Office
October 1967	Relocated the headquarters and factory to the Nippon Electric Seiki Co., Ltd. Mukojima Plant in Tsutsumi-dori, Sumida Ward, Tokyo
July 1970	Upgrading the Osaka Branch Office to a Sales Office
October 1972	Merged with San-O Electric Co., Ltd. through a merger-by-absorption. Capital increased to 20 million yen. ・Launch of the IC-470 Colorcon, which laid the foundation for the current printing business
December 1973	Increased the capital stock to 40 million yen
May 1979	Capital Participation by Hibiya Trading Co., Ltd.
June 1983	Increased the capital stock to 50 million yen
August 1985	Acquired a factory site within the Tsukuba Minami No. 1 Industrial Park
April 1987	New factory constructed in the Tsukuba Minami No. 1 Industrial Park; headquarters and factory relocated
October 1987	Increased the capital stock to 102.5 million yen
January 1989	Opened the Tokyo Sales Office in Nishi-Nippori, Arakawa Ward (Saito Building)
October 1996	Moved headquarters to Nishi-Nippori, Arakawa Ward (Saito Building) ・Developed an air conditioning control panel for telecommunications equipment rooms through a technical partnership with Daikin Industries, Ltd.
June 1999	Part of the NEC Group
November 1999	Tsukuba Plant obtains ISO 9001 certification.
October 2002	Sales Division Obtains ISO 9001 Certification Acquired the NTT control panel business from Densei-Lambda K.K. (formerly Nippon Electric Precision Instruments Co., Ltd.)
February 2004	Part of the Nomura Securities Group (Nomura Principal Finance Co., Ltd.)
November 2006	Head Office obtains ISO 9001 certification. Head Office, Tsukuba Plant and Osaka Sales Office obtain ISO 14001 certification.
February 2007	MEBO acquired all shares from its parent company, Nomura Principal Finance Co., Ltd. Capital stock set at 85 million yen
March 2010	Relocated headquarters to the Nishi-Nippori Station Plaza Tower in Arakawa Ward
November 2011	Osaka Sales Office obtains ISO 9001 certification.
August 2022	Construction of an office building at the Tsukuba Plant
January 2023	Construction of a warehouse at the Tsukuba Plant
November 2024	70th Anniversary of the Company's Founding