Allow the meat and pineapple to cook over medium-high heat, stirring frequently. When the meat is cooked and mostly browned to your liking, add the veggies (corn and peas) and cook over the stove top until warmed through. Remove from heat and add cooked rice. In a separate bowl, whisk together eggs, Yoshida's sauce, soy sauce and sesame oil. Pour this mixture over the rice and meat mixture, sprinkle with onion powder and stir constantly, over medium heat, until the liquids cook into it. Don't let it dry out too much. Serve immediately.