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April, 1915: Koito Genrokuro Shoten
April, 1936: Reorganized as Koito Manufacturing Co.
September, 1947: Established as NAIGAI SHOJI CO.,LTD .
July, 1948: Renamed to KOITO SHOJI CO., LTD.
May, 1957: Renamed to KOITO INDUSTRIES, LIMITED
March, 1988: Listed on the second section of the Tokyo Stock Exchange.
1 August 2011: Koito Industries newly established KOITO ELECTRIC INDUSTRIES, LTD., which took over all businesses excluding the aviation seat business. Concurrently, Koito Industries changed its trade name to KI HOLDINGS., LTD.
19 June 2019: Parent company Koito Manufacturing Co., Ltd. Conducted a tender offer and acquired 92.37% of shares.
30 July 2019: Delisted from the second section of the Tokyo Stock Exchange.
1 August 2019: Became a wholly owned subsidiary of the parent company, Koito Manufacturing Co., Ltd.