My wife is from Hawaii, and one of her favorite restaurants is Russell Siu's Kaka'Aku Kitchen - she loves their five-spice shoyu chicken. (Shoyu chicken is cut-up chicken slow-cooked in a soy sauce-based liquid). I found a Sam Choy recipe for shoyu chicken that started with teriyaki sauce. Using that as a starting point, I redid my shoyu chicken recipe. My wife's response was that the result was even better than Kaka'Aku Kitchen's (not that she's at all biased in my favor).