The name of this upscale sushi and sake bar may sound rock-hard (or rok-hard), but the sushi itself is nothing less than supple. Not soft, because that would imply textureless. Not pliable, because that would denote elasticity. And not flexible, because that might be stringy. No, we're talking fresh raw fish, cut thick enough to give your teeth just the tiniest moment of resistance before yielding. If there's one thing you can count on here, aside from the sake cocktails (or coktails), it's the reliability of the sushi chefs. Fish, after all, is only as good as the hands that cut it, and these are caring hands. You could even call them, well, supple.