The area was a major producer of silk and prospered from the Meiji period through the Taishō periods. As the demand for raw silk declined in Japan and abroad, Koromo entered a period of gradual decline after 1930. The decline encouraged Kiichiro Toyoda, cousin of Eiji Toyoda, to look for alternatives to the family's automatic loom manufacturing business. The search led to the founding of what became the Toyota Motor Corporation. Toyota built the first manufacturing facility, known as Toyota Honsha plant in November 1938, breaking ground in December 1935.