Koito Manufacturing Co., Ltd. (株式会社小糸製作所) is a conglomerate headquartered in Totsuka Ward, Yokohama, Kanagawa Prefecture, Japan. The company's primary products are lighting and electronic display systems for outdoor installations and rolling stock.
History
Koito was founded on 1 April 1915 as the Genrokurō Koito Shop (小糸源六郎商店), which began producing and selling Fresnel lenses for railway signal lights. In April of 1936, the company was reorganized as Koito Manufacturing Co. In September of 1947, the company was re-established as Naigai Trading Co., Ltd. (内外商事株式会社) and renamed to Koito Trading the following July. Another name change in May of 1957 saw Koito Trading become Koito Industries; that October, the company began producing glass-lensed sealed beam headlamps.
Between 1971 and 1982, Koito would begin manufacturing various lighting products, including lights for small watercraft and automotive halogen lamps. In 1988, the company was listed on the second section of the Tokyo Stock Exchange.
On 1 August 2011, Koito Industries became KI Holdings