Blazen is a beaut knife. Great balance. Excellent fit and finish. Feels great in the hand. A reasonably thin grind (not laser like though) with decent food release given its thinness.
You may find this thread helpful when it comes to thinning time:
I did a minor thinning as part of a sharpening on a Ryusen Blazen with a Chosera 1k (so maybe JIS 1500?). I was giong to refinish it with sandpaper. I was hoping that I was pretty close with the Cho 1k so that I wouldn't need to many grits in my sandpaper progression. For those that have done...
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I guess it would be a bit easier to refinish from a medium stone than from a coarse stone, so maybe consider a maintenance thinning schedule every time you need to drop down to a medium stone (I.e.: whenever a 'quick' touch up on a fine stone takes more than a dozen or so strokes to create a burr). And you will have a better performing knife in the meantime.