Japanese Chinese-style fried chicken

This recipe is from Buzzfeed Japan's video, on youtube here. It is fantastically good and unlike a lot of their other yummy recipes does not involve deep frying. I've written it down so that I don't have to go to their video and play and pause it repeatedly every single time I want to make this! I only have access to bone-in, skin-on chicken thighs so I learned how to debone them from here.

Ingredients

Chicken Marinade:

• 8 Skin-on, boneless chicken thighs
• 4 tsp Minced ginger
• 4 tsp Minced Garlic
• 3 tsp salt
• 8 tbsp rice wine vinegar or Sake

Sauce:

• 8 tbsp light soy sauce
• 8 tbsp vinegar (I've used everything from rice wine to apple cider)
• 4 tbsp sesame oil
• 4 tbsp sugar
• 1 tsp minced ginger
• 1 tsp minced garlic
• 4-5 scallions, finely diced
• 2-3 red peppers finely sliced

Potato flour
Frying oil

Method

1. Debone the chicken and cut off excess skin and fat. Cut small gashes through the skin and meat.
2. Marinate the chicken with the other ingredients under marinade for ~30 minutes. I marinate covered in the fridge if its going to be longer
3. Mix the ingredients under sauce together to make the sauce
4. Coat the chicken thighs in potato flour. 
5. Add a couple of table spoons oil to a frying pan and heat.
6.  Fry the thighs on medium heat, first skin side down for 5-7 minutes and then flip for 5-7 minutes.
7. Cut into slices and serve on rice with the sauce on the side or on top.