Uni Gunkan, also known as Sea Urchin Battleship Sushi, is a popular and luxurious sushi dish that features the delicate and creamy flavor of sea urchin. This dish is typically served as a nigiri-style sushi, where a small mound of seasoned rice is wrapped with a strip of seaweed and topped with a generous amount of fresh sea urchin. To make Uni Gunkan, you will need the following ingredients: