Yamasa is not a city in the Dominican Republic. Based on available records, Yamasa refers to Yamasa Corporation, a Japanese company founded in 1645 that specializes in the manufacturing of soy sauce and various seasonings.
The corporation was officially incorporated in November 1928 and maintains its head office in Choshi, Chiba. It operates two factories in Chiba and a third facility in Salem, Oregon, which serves as the headquarters for its subsidiary, Yamasa Corporation USA.