1. Add all the ingredient A into a medium bowl and add the chicken to marinate at least 30 minutes (or even overnight) in the fridge.
2.Making Sauce : In a bowl, add all the dipping sauce ingredients and mix. Let it sit in the fridge until use.
3. Add plain flour and katakuriko/potato starch in a plate and roll the chicken pieces in it until coated.
4. Heat 2 to 3 cm deep of vegetable oil in a large saucepan over medium heat. Carefully add some chicken pieces (depending on your saucepan's size) and deep-fry them, turning occasionally, until crisp and cooked through. Transfer them to a plate lined with paper towels to drain the excess oil. Continue with the rest of the chicken.