 Miyata returned to motorcycle production with the "Asahi AA" in 1933.The "AA" was the first mass-produced Japanese motorcycle, and was highly successful, leading to construction of a new plant at Kamata in 1938.However, after the Second Sino-Japanese War broke out in 1937 resources and materials for motorcycle construction became increasingly scarce, and in 1939 Miyata's Kamata plant was converted by the government to produce components for military aircraft.