Combine the first six ingredients in a small bowl to make the Seasoning Mix and set aside.
Heat the oil in a large skillet over high heat, about 2 minutes. Add the onions, carrots and celery and stir well. Cook, stirring frequently, until onions are translucent, about 3 minutes. Add the pork and Seasoning Mix. Cook, stirring frequently and breaking up the meat until the pork is no longer pink, about 3 minutes. Add the mirin, soy sauce, oyster sauce, ginger, garlic and sugar. Stir well until combined, then add the shrimp. Continue to cook and stir until shrimp are half cooked, about 2 minutes. Add the flour and stir in until dissolved. Add the green onions and sesame oil. Stir until evenly mixed, then remove from heat.
Spread the mixture in a thin layer on a sheet pan and refrigerate until cold.
Spread a ½-inch diameter line of filling onto one lumpia/springroll wrapper. Start rolling the wrapper tightly into a cylinder about 3/8 inch diameter. If the wrapper is large, cut off the excess and discard. Seal the edge of the roll with egg white. Brush the outside of the roll lightly with egg white. Sprinkle the outside of the roll lightly with black and white sesame seeds.
In a deep fryer (or in a skillet with 1-inch of oil), fry the springroll in 350°F oil until golden brown and cooked through, 3 to 4 minutes. Serve with Teriyaki Dipping Sauce.