Soy sauce (US) or soya sauce is a fermented sauce made from soy beans (soya beans), roasted grain, water and salt. It is commonly used in Chinese, Japanese and Korean cuisine. It appears in some Western cuisine dishes, especially as an ingredient in Worcestershire sauce. Real soy sauces are fermented with kōji (麹, the mold Aspergillus oryzae or "A. sojae") and other related microorganisms. 