Take a bowl and mix the flour with the ice water.
Whisk it slowly till it becomes a liquid batter.
Heat oil in a deep pan on high heat.
Dip the prawns first in the dry flour then in the batter and fry them till golden brown.
For the sauce, pour the Soya sauce in a pan, add the sugar and mirin.
Bring the sauce to a boil.
Serve the prawns with the sauce.
A traditional Japanese cuisine which you can easily make at home. Batter coated prawns fried crisp golden.