Japanese Fried Chicken Thighs (Karaage)

3 tablespoons, soy sauce

2 tablespoons, sake

1 tablespoon, grated fresh ginger

2 , garlic cloves, minced

3/4 teaspoon, sugar

1/8 teaspoon, table salt

1 1/2 pounds, boneless, skinless chicken thighs, trimmed and cut crosswise into 1- to 1½-inch-wide strips

1 1/4 cups, cornstarch

1 quart, vegetable oil, for frying

, Lemon wedges