Tamagoyaki is such a integral part of Japanese food that I am rather kicking myself for not having posted a recipe for it before here. The name _tamagoyaki_ means "fried egg", and the alternate name, _atsuyaki tamago_, means "thick fried egg". (Some books or restaurants erroneously called it just _tamago_, which just means "egg".) A slightly sweet, moist square-shaped egg concoction, tamagoyaki is a bento box staple, as well as being a popular sushi _neta_ (topping). It's also great as a side dish for any meal.