Can’t go wrong with chilli, soy and mirin. Add chopped spring onions or sesame seeds if liked. Also, plain mayo is pretty good too - okonomiyaki vibes. Since I was gifted with the bottle of pomegranate molasses, I’ve been using that in dipping sauces instead of mirin and it sure packs a punch. Might have to find another bottle when this one runs out. Aldi sells a balsamic vinegar-based fig glaze that makes a nice dipping drizzling sauce too.