Ei Shun is a traditional Japanese dish that consists of grilled fish, typically served with rice and various side dishes. The fish is often marinated in a mixture of soy sauce, sake, and mirin, which enhances its flavor and tenderness. This dish is popular in Japanese cuisine and is enjoyed for its simplicity and health benefits. In addition to being a staple in many households, Ei Shun is commonly featured in kaiseki meals, which are multi-course dining experiences. The dish highlights the importance of seasonal ingredients in Japanese cooking, showcasing the natural flavors of the fish and accompanying vegetables.