What is Bonito Flake?
One of the most important components in Japanese cuisine is katsuobushi or dried bonito flake. Katsuobushi, which is high in umami flavor, is used to make stock and a topping, garnish, and spice for everything from noodles to rice to eggs.
When used as a topping on delicacies like okonomiyaki and takoyaki, they are said to move or dance. If you become queasy when you see moving food, it can be a weird sight at first. It is, however, nothing to be concerned about.