While the rice is cooking, combine the teriyaki marinade (½ cup), brown sugar (2 Tbsp), grated ginger (1 tsp), and garlic (2 tsp) to a bowl and whisk together.
Add the bite-sized pieces of salmon (1 lb) to the teriyaki marinade and spoon the marinade over the salmon until it's covered. Cover the bowl with plastic wrap and place it in the fridge to marinate for 15 minutes.
Place a nonstick frying pan on the stove and heat it on high. Once hot, spoon the salmon into the frying pan, making sure not to add all of the marinade to the pan. A little bit of marinade on the salmon is fine, but if you add all of it, the salmon will burn before it is cooked through. Saute the salmon for about 5-6 minutes, stirring constantly to cook evenly. Fish should cook to an internal temperature of 145° F and will be flaky when cut with a fork.
Remove the salmon from the pan and cover until ready to eat.