[sushidushi]

Soya sauce is the same thing as soy sauce. It's made from soya beans. I understand that the Japanese soy sauce, such as Kikkoman, is a bit different from the Chinese version, but use whichever you prefer. I have bottles of Kikkoman light colour soy sauce (not low sodium), the regular dark one, and another of Tamari, which I haven't yet opened. I'll probably just stick with the light coloured one in future.