Soy sauce is
one of the oldest spices in the world. First it was used in China
in the 16th century. Nowadays soy sauce is also well known in Western
countries. The sauce is made out of soy beans and wheat and is called
"Shoyu, Shoya or Schoyu" in Japan, "Chiangyu"
in China, "Ketjap" in Indonesien and "Toyo"
in the Phillipines.
Japanes soy sauce is less salty and more mild like Chinese brands.
Also you can
find dark soy sauce, light soy sauce and sweet soy sauce. Dark soy
sauce has a heavy salty taste, light soy sauce is not as salty as
dark sauce. Sweet soy sauce is sweetend and looks almost like syrup.