Something I wouldn't care to do often.
That stone could use a flattening.
Though I could not caution all I still might warn a few: Don't raise your hand to raise no flag atop no ship of fools. - Robert Hunter
man that is one huge amakusa , I wonder how they lap it if at all.
That looks like fun...
haha. OK I want one. Would be fun trying to sharpen it.
Do any Japanese flatten their stones?