Ingredients: - 1 yellowtail fillet - 1/4 cup soy sauce - 2 tablespoons fresh lemon juice - 1 tablespoon rice vinegar - 1 tablespoon mirin - 1 teaspoon grated ginger - 1 green onion, thinly sliced Steps: 1. Slice the yellowtail fillet into thin sashimi slices. 2. Arrange the slices on a serving platter. 3. In a small bowl, whisk together the soy sauce, lemon juice, rice vinegar, mirin, and grated ginger. 4. Drizzle the ponzu sauce over the yellowtail slices. 5. Garnish with thinly sliced green onions. 6. Serve the hamachi sashimi immediately. Enjoy the freshness of the yellowtail sashimi paired with the tangy and citrusy ponzu sauce!