Start by chopping the chicken thighs into similar-size pieces and season with a bit of salt and black pepper to taste.
Prepare the marinade. Add all ingredients into a bowl and mix it well.
Add the chicken into the marinade and mix it so the chicken is completely coated by the marinade. Let is rest from 20min - 1hour.
Coat the marinated chicken with the cornstarch.
In a medium-high heat pan, add the vegetable oil. Once the oil is hot (if you have a thermometer, it is about 350ºF (175ºC)), add the chicken. Do not overcrowd the pan.
Fry the first time for about 90 seconds. Remove the chicken and place it into a plate with paper towel. Keep doing it until all chicken is fried.
Now, you will fry for a second time. Add the fried chicken again for an extra 45 seconds or until the outside is golden and crispy. Remove and place it into a plate with paper towel on top.
When serving Tori Karaage, you can opt to squeeze a lemon on top and add a side of mayo (Japanese mayo would be the best option). Serve it on top of white rice. It also combines really well with Japanese curry (Kare Raisu)