is a Kyoto-based Japanese company specializing in the development and production of lead acid and lithium-ion batteries, used in automobiles, motorcycles and other areas including aerospace and defense applications. History Yuasa In 1909, Shichizaemon Yuasa established Yuasa Iron Works to modernize the family business, founded in 1666 as a charcoal trading business. Yuasa Iron Works began producing storage batteries in 1915, and three years later Yuasa Storage Battery Co., Ltd was established. Soon after, Yuasa Storage Battery Co., Ltd began making Japan's first automotive batteries. In 1925, Yuasa began making dry cells, and in 1941 they began making alkaline cells. The dry battery business was later spun off into Yuasa Dry Battery Co., Ltd, which later merged back into Yuasa Storage Battery Co., Ltd to form Yuasa Battery Co, Ltd, later renamed to Yuasa Corporation. GS In 1904, Genzo Shimadzu (b. 1869 d. 1951) developed a high-capacity lead-acid battery to supply backup power to his factory during outages of Kyoto's then unreliable power grid. The Japanese navy purchased 400 units of this battery. Shimadzu established Japan Storage Battery Co., Ltd in 1917 and began producing automotive batteries in 1919. In 1938 they began producing alkaline batteries and in 1940 they began making high-pressure mercury lamps. GS was established in 1917 and is an abbreviation comprising the initials of Genzou Shimadzu (the founder's name of Japan Storage Battery). He was also the founder of Shimadzu Corporation. GS Yuasa In 2004, Yuasa Corporation merged with Japan Storage Battery to form GS Yuasa Corporation. As of 2014, GS Yuasa had 9 plants for manufacturing industrial lead-acid and NiCd batteries and 5 plants for Li-Ion cells. GS Yuasa also sells other products including power supplies, lamps and motorcycle batteries. Now the top power sports battery producer, Yuasa provides nearly 90% of the batteries used in power sport vehicles in North America. Joint ventures GS Yuasa was one of the active players in the electric vehicle battery industry during the late 2000s to early 2010s when numerous battery vendors largely from Japan had formed alliances with car manufacturers to enter the novel market of EV. Lithium Energy Japan In 2007, GS Yuasa and Mitsubishi Motors have formed an alliance and started a joint venture named Lithium Energy Japan (LEJ) that develops and manufactures lithium-ion batteries for automotive and industrial use. The Mitsubishi i-MiEV, the first mass-produced electric car, was equipped with the batteries from LEJ.