Jidosha-Seizo Kabushiki-Kaisha ("Automobile Manufacturing Co., Ltd." in English) was established on December 26, 1933, taking over all the operations for manufacturing Datsuns from the automobile division of Tobata Casting Co., Ltd., and its company name was changed to Nissan Motor Co., Ltd. on June 1, 1934. The founder was Yoshisuke Aikawa, the brilliant leader of the Nissan combine. He had grand plans to mass-produce 10,000 - 15,000 units per year, and was about to putting his plan into practice.
The first small-size Datsun passenger car rolled off the assembly line at the Yokohama Plant in April 1935, and vehicle exports to Australia were also launched that same year. Datsun cars symbolized Japan's rapid advances in modern industrialization in those days, as evidenced by the contemporary slogan, "The Rising Sun as the flag and Datsun as the car of choice." VTR: The production line for the Datsuns (small passenger sedans and pickup trucks) is shown at the Yokohama Plant in 1935. (819KB) Nissan's history goes back to the Kwaishinsha Co., an
automobile factory started by Masujiro Hashimoto in Tokyo's Azabu-Hiroo district in 1911. Hashimoto was a pioneer in Japan's automotive industry at its inception and throughout its initial years of struggle. In 1914, a box-type small passenger car was completed based on his own design, and in the following year the car made its debut on the market under the name of Dat Car.
It is a well-known story that the name Dat represents the first letters of the family names of Hashimoto's three principal backers: Kenjiro Den, Rokuro Aoyama and Meitaro Takeuchi. Jitsuyo Jidosha Co., Ltd., another predecessor of Nissan, was established in Osaka in 1919 to manufacture Gorham-style three-wheeled vehicles, designed by the American engineer William R. Gorham. The company imported machine tools, components and materials from the U.S., and thus was said to be one of the most modern automobile factories. Kwaishinsha Co. and Jitsuyo Jidohsa Co. merged in 1926 to form Dat Jidosha Seizo Co., which, in 1931, became affiliated with Tobata Casting, a company founded earlier by Aikawa. That would lead two years later to the establishment of Nissan Motor Co.
source http://www.nissan-global.com/GCC/Japan/History/history/index-e.html