Several mergers would emerge until the 1930s and a Japanese government regulation that allowed people to drive cars with engines up to 500-cc (.5-liter) without a license. That’s when the company created a series of 495-cc cars called #Datsons, which was supposed to mean “Son of DAT.” Two years later, the name #datsun was established. See more at https://www.carbageonline.com/nissan-monozukuri-history (at Petersen Automotive Museum)