For marinade, whisk ingredients in a bowl and season to taste. Add kingfish and marinate in refrigerator for 30 minutes.
Meanwhile, combine vinegar, sugar, 1 tsp salt flakes and 80ml water in a small saucepan over medium heat and bring to the boil (3-5 minutes). Transfer to a heatproof bowl. Add carrots and radish and stir gently to coat. Cool to room temperature before using (30 minutes).
For togarashi mayonnaise, combine ingredients in a small bowl and season to taste.
To serve, divide rice into bowls, and top with pickled vegetables, edamame, mesclun, kingfish and avocado. Scatter with togarashi and serve with mayonnaise.
