Cut the chicken into bite-sized pieces. Pierce with a fork and massage in the ingredients marked (A) and set aside. (Add enough cooking sake to cover).
Add the (B) ingredients and let sit for 10 minutes (or more than 1 hour if possible).
Lightly grease the oven's broiler rack with oil. If unavailable, line a baking tray with parchment paper.
Dredge the chicken by alternating through the (C) mixture, (D) mixture, (C) again and finally (D), while preheating the oven to 250°C.
Shake off the excess flour from Step 4 and bake for 15 to 20 minutes, and you're done.
Serve with a wedge of lemon (optional).
You can fry these in oil after they're baked for extra crispiness (this will add calories, though).