Considered by many in America to be a Japanese classic (one Reddit
user called it "infamous"; a
blogger speculated that there are really only "two types of folk that dine at a hibachi restaurant, those that get double white sauce and those that don't know you can get double white sauce"), the sauce's sweet, slightly tangy flavor varies between restaurants and regions as much as the name does. A little more sweetness in one place. A little more tang in another. Some versions are reminiscent of
fry sauce, popular in the South. Such variety calls into question whether the sauce we taste in our local teppanyaki restaurants is even Japanese at all.
Maybe not surprisingly, the answer, it appears, is no.