In a small sauce pan, mix together all of the ingredients for the teriyaki sauce expect for the cornstarch. Let it come up to a boil before adding in the cornstarch to thicken then remove the pan from heat.
In a large skillet/pan on medium heat, add in olive oil and snap peas. Let the snap peas cook for 2 minutes before adding the shrimp and a pinch of salt into the pan and the sauce. Cook until the shrimp is cooked through, approximately 4-5 minutes.