Abstract
This study aimed to examine the factors that have increased domestic soybean use. First, I summarize the domestic production and demand trends for soybeans. Second, I describe the status of the renewal of domestic soybean varieties. Third, I examine cases regarding two fermented soybean-producing businesses that positively utilize domestic soybeans. This case study describes the transaction content and information exchange between fermented soybean-producing businesses and soybean producers.