Kohada donburi is a comforting and satisfying rice bowl dish that features marinated gizzard shad. To make this dish, you will need cooked Japanese short-grain 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, grill or broil the fillets until they are cooked through. Place the cooked rice in a bowl and top it with the grilled kohada fillets. Garnish with thinly sliced cucumber. The combination of the flavorful marinade, tender fish, and fluffy rice makes Kohada donburi a delicious and satisfying meal.