Yamasa Corporation is a Japanese soy sauce manufacturer founded in 1645. Its U.S. subsidiary, Yamasa Corporation USA, operates a plant in Salem, Oregon, producing naturally brewed soy sauce and tamari for the North American market. Yamasa soy sauce is fermented using traditional methods with soybeans, wheat, water and salt, resulting in a rich umami flavor. The company supplies retail bottles, foodservice containers and bulk soy sauce to restaurants and food manufacturers and also offers teriyaki sauces and seasoning sauces. Yamasa emphasizes quality, authenticity and consistency.