The DAT corporation had been selling full size cars to Japanese consumers under the DAT name since 1914. In 1930, the Japanese government created a ministerial ordinance that allowed cars with engines up to 500 cc to be driven without a license. DAT Automobile Manufacturing began development of a line of 495 cc cars to sell in this new market segment, calling the new small cars "Datson" – meaning "Son of DAT". The name was changed to "Datsun" two years later in 1933.