The 1940s was a decade of rapid industrialization in Japan, especially in the automotive industry field. During the decade, automotive production plants were built one after another backed by a booming industry. It was also a decade when Minezawakoki’s marketing efforts paid off, achieving major automotive industry partners, including Toyota Motor Corporation. This represents a landmark in the Minezawakoki’s history?winning partners meant assuming a major role in supporting the automotive industry, one of the key industries in Japan, and stabilized business operations significantly at the same time. It was also a decade when Minezawakoki’s marketing efforts paid off, achieving major automotive industry partners, including Toyota Motor Corporation, which had been a customer since Minezawakoki’s foundation. This was a milestone for Minezawakoki in that it came to play a major role in supporting the automotive industry, one of the key industries in Japan, thus stabilizing its business operations significantly at the same time.