Depending on the quantity you need, start with this amount: 1 C. Aloha shoyu (you can get it on Amazon), 1/4 C. water, about 1/2 C. brown sugar (to taste for sweetness desired) 1 thumb-size piece fresh ginger root smashed, 2 cloves fresh garlic smashed, 3 capfuls dry sherry (not cooking) or whiskey, freshly ground black pepper, and 2 thinly sliced green onion (scallions). Optional is sesame seeds and 1 chopped long red hot chili.
Mix shoyu, water, and brown sugar. Taste for sweetness desired. If not sweet enough add more sugar. If too sweet add a tablespoon more shoyu at a time and taste. Smash the ginger root and garlic, add to the sauce. Add the rest of the ingredients and taste again. Adjust to taste. Marinate your meat at least 2 hours. Better if overnight!
For teriburgers, it only takes a little sauce (maybe 3 tablespoons) mixed in with 1 lb. ground beef then baste the patties on the grill with the rest of the sauce.