They are first marinated in teriyaki sauce, a sweetened version of soy sauce with the addition of sake, honey, and ginger. It's very bland and, when cooked, very, very dry. A living organism used in the production of bread and beer. Yeast, in the environment of sugar, produces carbon dioxide and alcohol. This process is called fermentation.
Bread yeast comes in dry granulated and fresh cakes.
A new form of yeast, called instant yeast, has been developed which allows the user to mix the yeast directly into the flour without dissolving it first in water. A thick, custard-like, mildly acid preparation. Usually made by fermenting partly skim or skim milk with a special culture. Fruit of other flavorings may be added. A baked batter of flour, milk and eggs, commonly with the addition of meat juices.