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You forgot to draw the smiley mouth ?:)
So that looks kind of 2/3 of the way down, and fairly shallow, so the question is, can you work with it and lap it out over time, or is it in your way?
And...

Where on your stone is the gouge? If it's close to the end you could just leave it and let it lap out over time.

Ok, I have been known to be not correct from time to time. I wonder what not soaking mine has done.

No worries, that's just what I took from a variety of threads from when I was trying to find out about different hones though there were two camps then if I recall, I am pretty sure that's how Lynn...

I am fairly sure that you aren't supposed to soak naniwas, I think you just spray the surface, nortons need soaking.
Sorry Siguy that's all I have got.