History of Toyota (post-war) : An era of rapid expansion

In December 1945, Toyota was given permission by the United States military to startup up peacetime production. Toyota Motor Corporation had learned from the American War Department’s industrial training program, which worked on process improvement and employee development; the program, abandoned in 1945 by the United States, lived on in Japan as Taiichi Ohno built kaizen and lean manufacturing around it. (From globalspec).
After World War II, Toyota was kept busy making trucks, but by 1947 it began making the Model SA, called the Toyopet, a name to stay with Toyota for decades, albeit attached to different cars. The Toyopet was not powerful and had a low top speed – 55 mph from a 27 horsepower engine – but it was designed to be cheap, and to handle the rough roads of postwar Japan. In the five years the SA Toyopet was made, 215 were made. The SD may have been more successful; this taxi version saw 194 copies in just two years. The SF Toyopet was the first truly popular Toyota car, with a modified engine (still putting out 27 horsepower) and a taxi version. An RH model with a 48 horsepower engine came out shortly after By 1955, Toyota was making 8,400 cars per year; by 1965, 600,000 cars per year.
In addition to all these cars, Toyota started producing a civilian truck named the Land Cruiser. Styled like Jeeps, the original Land Cruisers were, according to Schreier, based heavily on the legendary Dodge half-ton weapons carrier as well as the Bantam (predecessor of the Jeep) They used a bigger engine than the Jeep (their Chevrolet-clone six) and a size and configuration more like the Dodge weapons carrier, whose capacity it shares (one half ton).
Starting in 1955, Toyota produced its first luxury car, the Crown, powered by a four cylinder, 1.5-liter engine with a three-speed column shift, followed by the 1-liter Corona; only 700 cars per month were made in 1955, but this rose to 11,750 in 1958, and 50,000 per month in 1964.