Mackerel is a flavorful and oily fish that pairs well with the umami taste of soy sauce. To make soy sauce glazed mackerel, simply marinate the fish in a mixture of soy sauce, mirin, ginger, and garlic for at least 30 minutes, then grill or broil it until it is cooked through and the glaze is caramelized. The result is a delicious and satisfying fish dish that is perfect for a quick and easy dinner.