As with any Japanese recipe, timing is key. The shrimp should be dipped in ice-cold batter in order to keep them from curling up during the deep-frying process. Adding ice-cold water to the batter before frying will ensure that the batter is cold before you add it to the oil. Keeping the shrimp in a cold place before dipping it in the batter will help them stay crispy.
This website provides approximate nutrition information for convenience and as a courtesy only. Nutrition data is gathered primarily from the Spoonacular Database, whenever available, or otherwise other online calculators.