Originally Posted by
kevint
The reason, I think, is as I said: The ura is not ground true- the few I have are all ground very nicely, but it is still a rough grind. A chisel, kogatana, plane(all single bevel instruments) backs are rough ground at first but the user polishes the ura to flat, finish grit polish, then hones the other side; only touching the back on the finish stone to remove the bur. basic sharpening right?
Both aspects are important to ultimate sharpness and a strong edge: flat and fine polish. The only way to get that on the wa is to hone a microbevel on the ura.
And since it must be there, honing to a true precepticle bur with the omote on the stone is not as necessary as when doing true one sided sharpening. Thinking: I will cut past where the bur would be by doing several strokes. (probably a justification for being lazy) But once it is there all you may need is a single pass ( I do several for the reason above )to clean up until it becomes honed away -then refresh it.
What is hasami, a scissor or type of knife?