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I am thinking a 2 stage attack

Step 1.
Some spine off the hone Circles at the 4k level probably start at about a 45° angle to eliminate the frown, then drop to maybe 1 spine width above the...

Yikes...

Yeah that is going to be some fun... A hone worn Kamisori with a slight frown :banghead:

Seeing more and more of them however..

You are going to have to get around that frown, and...

Looking at the pics

There is no difference with how you hone this one, the difference is in the wear from the previous owners..

Just like western razors that are "Hone Worn" from improper...