If you judge a sushi restaurant not by what's familiar but by what's exotic, then Kawai is completely for you. Sure, the eatery stocks the raw basics: superb salmon, glistening tuna, supple hamachi. And yes, the menu offers the requisite rolls, 30 in all, ranging from combos highlighting barbecued eel to those featuring soft-shell crab. But Kawai also keeps the Arctic surf-clam lover in mind and enjoys displaying specials that have come in fresh that day, posting hand-lettered signs on the sushi bar. Here, you can glean sea urchin, tangy and mineral-rich, or raw, sweet prawn that's served with a side of the shrimp's deep-fried head. If you grow bored with experimentation, there's always the cooked Korean food to sample, an endeavor well worth undertaking -- and a culinary journey that can't be replicated in any other South Florida eatery.