1. Spread 1Tbsp amamiso on 25cm square sized plastic wrap. Place a fish fillet on it and coat with the rest of the amamiso. Wrap it tightly. The same process for the other fillet. Let it stand for 30minutes

2. Prepare 2 sheets 25cm square sized waxed papers. Fold each paper to make a triangle. Wipe out amamiso from the fish and place it lengthwise on the triangled waxed paper. Fold up the both edge and twist. Twist the remaining edges to make a boat-shape. The same process for the other fillet.

3. Place a bacon rack on the turntable and put the packages on the edges.

4. Microwave on 600W for 4-5minutes (2-2 and half minutes on 1200W). Take out when the fish is cooked.

5. Remove the waxed paper and arrange on plate with sweet-vinegared ginger.

For how long you should cook with your microwave oven, see Cooking Time vs Wattage Conversion.
For more tips of using Microwave Oven, see Sachiko's Guideline to Microwave Cooking.