Marinate pork in teriyaki sauce for several hours in refrigerator.
Add pineapple juice to a saucepan and bring to a boil. Add rice and cook for about 15 minutes or until rice is tender and liquid is absorbed.
In a large skillet, over medium high heat, stir fry pork in hot oil for about 5 minutes or until browned. Add onion and peppers. Stir fry for 5 minutes. Stir in pineapple chunks and almonds. Heat through.