Here it is from the Wikipage on Soichiro Honda (a pretty interesting character):
In 1937, Honda founded Tōkai Seiki to produce piston rings for Toyota. During World War II, a US B-29 bomber attack destroyed Tōkai Seiki’s Yamashita plant in 1944 and the Iwata plant collapsed in the 1945 Mikawa earthquake. After the war, Honda sold the salvageable remains of the company to Toyota for ¥450,000 and used the proceeds to found the Honda Technical Research Institute in October 1946.[7][8] In 1948 he started producing a complete motorized bicycle, the Type A, which was driven by the first mass-produced engine designed by Honda, and was sold until 1951. The Type D in 1949 was a true motorcycle with a pressed-steel frame designed and produced by Honda and with a 2-stroke, 98 cc (6.0 cu in) 3 hp (2.2 kW) engine, and became the very first model in the Dream series of motorcycles.
I recalled that the first run of Honda motorbikes were powered by salvaged generator motors he bought on the surplus market. Soichiro Honda was what one could call a survivalist entrepreneur.