I tried to post this yesterday, but must have screwed something up. Sorry if my question ends up getting posted twice...
I need to sharpen my wife's Misono Sujihiki knife. It doesn't appear to have a bevel on the back, so I think it is a single bevel? I searched around a bit and found a video and some descriptions of uraoshi. I took a few swipes on the 8000 stone and it appears the back is convex - the middle is getting polished, but the edge and spine are untouched. So I am wondering how to proceed. I'm afraid if I try to flatten the entire back, I'll remove too much material. Should I just put a back bevel on it? Do these knives generally have convex backs?