1 tablespoon butter or margarine 2 cups sliced chicken or beef 1 can (1 lb, 3 oz) bamboo shoots, drained and sliced 1 can (5-3/4 oz) button mushrooms, drained 1 can (14 oz) shiratake, drained 1/3 cup raw sugar 1 cup chicken broth 1/2 cup soy sauce 1/4 cup sake 1 block firm tofu, cubed…