Toyoda Model G1 truck was the first automobile commercially produced by Toyota, under the leadership of its founder Kiichiro Toyoda (who was then managing director and chief engineer at Toyoda Automatic Loom Works).

Kiichiro initiated the development of a small engine in 1930, which led to the successful prototyping of the Type A engine in 1934 based on the design of a 1933 Chevrolet engine. In May 1935, the first unit of the prototype Model A1 passenger car was completed. Because Kiichiro had little experience in automobile production, or they had to be in line with the national policy, however, he chose to focus on the development of trucks first, as they were easier to build than passenger cars. As a result, the Model G1 truck was completed in August 1935 and announced in November 1935. Its chassis resembled that of a Ford truck. The water-cooled inline 6-cylinder OHV engine (Type A) measured 84 mm x 102 mm with a displacement of 3,389 cc, and produced 65 hp/3,000 rpm. The G1 truck was 5,950 mm in length and 2,191 mm in width on a 3,594 mm wheelbase, with a maximum load capacity of 1.5 tons. The chassis price was 2,900 yen, which was 200 yen cheaper than the Ford. A total of 379 Model G1 trucks were produced.

The G1 was remodeled as the GA in September 1936, adopting a more subdued design for the top of the radiator grille and reshaping the front body to facilitate the stamping process. In May 1937, the Model GY with a shorter wheelbase was added to the lineup.