Dynamite Sauce at Sushi by Yoshi
I make a sauce that seems very similar by mixing hoisin and siracha, about half and half. It seems very similar to the dynamite sauce used by Sushi by Yoshi on Nantucket. Is that the one you want? I put in in a ketchup squeeze bottle in the fridge, and use it on all sorts of dishes, even great alone on rice. My daughter loves it, too.