I used tamari in this recipe, however, you can also use soy sauce. The marinade for the tofu is made with tamari and go-chu-Jang. The sauce that is poured over the top of the rice and vegetables is oil-free. It's made with tamari, go-chu-Jang, maple syrup, rice vinegar, and garlic. It has a sweet, tangy, spicy flavor that really brings the vegetables, tofu, and rice together with a rich signature flavor.