When eating sushi, it’s customary to dip each morsel into a small dish of soy sauce before popping it into your mouth. True connoisseurs hold that the proper way to do this is to first turn each piece over so that just the fish, and not the rice, comes into contact with the soy.
However, gripping the piece firmly enough to pick it up, yet gently as to not crush the rice, rotating it 180 degrees for the dip, then spinning it back again to eat can be tricky, especially if you’re not used to chopsticks (or if you’re not used to the sake you’ve paired with your sushi). So if you’ve got a cultured palate but lack manual dexterity, this special sushi soy sauce spray is seemingly the solution.