"Original" Sauce	

My sister's favorite "Oriental" sauce (I don't know how authentically Oriental it is!) is Mr. Yoshida's Original Gourmet Sauce.

She declares that she discovered (quite by accident) that the following ingredients make a similar sauce:

Soy Sauce

Brown Sugar

Neither of us is sure how much.  Prepare over low heat, stirring constantly until it tastes the way you like!