01 - Whisk together mochiko, cornstarch, soy sauce, sugar, eggs, garlic, ginger, green onions, sesame oil, salt, and black pepper in a large mixing bowl until completely smooth and well combined.
02 - Add chicken pieces to the marinade, tossing thoroughly to ensure each piece is evenly coated. Cover bowl and refrigerate for at least 4 hours, or overnight for optimal flavor development.
03 - Pour vegetable oil into a deep pot or large skillet to a depth of about 2 inches. Heat oil to 350°F, maintaining temperature throughout frying process.
04 - Remove chicken from marinade, allowing excess to drip off. Fry in batches, turning occasionally, until golden brown and cooked through, approximately 5–7 minutes per batch.
05 - Transfer fried chicken to a paper towel-lined plate to drain excess oil. Repeat frying process with remaining chicken pieces. Serve hot, garnished with additional green onions, sesame seeds, and lemon wedges if desired.