I knew what you were referring to before I even saw the image... daikon is DELICIOUS. I used to go to a late night sushi joint on St Mark's Place that had a veggie roll with chunks of this in it. It was SOOOO good. That's how I first discovered daikon. Now, I get excited anytime I spot it in a dish, which is not often enough. I haven't had the katsu don at Honshu in forever, but I don't recall it ever having daikon, so I will have to go check it out. Thanks for the tip!