How it started
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 Jr. (島津 源蔵, Shimazu Genzō; 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 Jr. who founded Japan Storage Battery in 1917. He was also the second president of Shimadzu Corporation founded in 1875 by his father, Genzo Shimadzu Sr. (島津 源蔵, Shimazu Genzō; b. 1839 d. 1894).
GS Yuasa
From Wikipedia’s article on GS Yuasa, shared under CC BY-SA 4.0.2