Kohada donburi is a comforting and satisfying rice bowl dish that features gizzard shad as the main ingredient. To make this dish, you will need cooked sushi rice, kohada fillets, soy sauce, mirin, sugar, and thinly sliced cucumber. Start by marinating the kohada fillets in a mixture of soy sauce, mirin, and sugar for about 30 minutes. Then, place the marinated fillets on top of a bowl of sushi rice. Garnish the donburi with thinly sliced cucumber for a refreshing crunch. The combination of the tender kohada, the sweet and savory marinade, and the fluffy sushi rice creates a delightful and satisfying meal.