In a small bowl whisk together soy sauce, rice wine vinegar, and miso. Set aside.
In another small bowl beat eggs together. Set aside.
Heat 1 tbsp canola oil in a large skillet over high heat. When oil shimmers add spam and pineapple and cook, stirring occasionally, until browned, about 5-7 minutes. Remove to a bowl.
Add 1 tbsp canola oil to the skillet then add bell pepper, carrot, and corn. Cook, stirring occasionally, for 3-4 minutes until softened and browned. Add garlic and green onions and cook briefly until fragrant.
Move vegetables to one half of skillet and pour beaten eggs into the other half. Gently stir to break up curds as they form. Mix together with vegetables.
Add soy sauce mixture to the skillet. Add rice and return spam and pineapple to skillet. Mix together then spread into an even layer. Let cook for about 20-30 seconds then mix and spread into an even layer again. Repeat 2-3 times until rice is lightly browned. Remove from heat and serve. Garnish with basil or tops of green onions, if desired.