The last picture looks a bit like the one I own.
They are beautiful stones indeed, and their legacy is just mind-boggling.
I find that very appealing. Mine performs excellent. I have used it in any imaginable way. Sure you can use a Unicot type of approach. On the 2 Japanese naturals I ever used, it worked just fine, although the bevel correction stage takes a bit longer, but not that much.
They also display a degree of "slurry-dulling" , albeit less than most Coticules. I would always finish on plain water. One of the special features, that no one ever talks about, is that with the right amount of water (which is only a little) they exert a favorable suction to the part of the bevel in contact with the hone. (This is something a Coticule does not do) You can clearly recognize the sweet spot by the razor developing a slight draw on the surface of the hone. This helps for an evenly polished and keen edge, because it prevents the very thin end of the edge to flutter while it travels over the hone. I find it key for getting the best results off the ones I tried.
I am annoyed though by the amount of hype they receive. In the end, the edges are not better than those of a Coticule. I could be accused of being biased, but I'm not going to mind about that.
I can honestly say that I spend €350 on a Nakayama in the hope that it would add the magic everyone was talking about at that time. It was not. For a while I thought I was sold a lesser one, till my friend Seth, who lives in Japan, was so kind to lend me one that performed among the very best, according to his own experience with several Japanese natural hones. I have thoroughly tested and compared and I know now that these are excellent hones, that yield great results if you take your time to figure them out. But beware people saying that they'll give you
magical edges, certainly if you already mastered honing on a Coticule first.
I always wondered about the reasons behind the hype. I know for fact that excellent, yet small hones can be bought locally in Japan for €20 or less, and those are sold overseas for almost 10 times that amount. (and I suspect the same goes for larger specimen too) That's a nice profit. You can all start praying that Ardennes never goes out of business, because smart people will start to do exactly the same with Coticules. (No I won't be among those "smart" people
money is a means for me, not a goal)
Anyway, one of the main reasons for success is that the Japanese natural escapes the "less is more" hoax. I'm going to be whipped for this :O - disclaimer: yes you can hone razor with a "less is more" approach and if you are going to aim for hitting the desired sharpness levels on a coarse synthetic hone and only clean up the scratches after that, "less is more" can be exactly what you need -. Eventually, a guy works his way up to 10 laps on a 16K Shapton, this way, and then he jumps to his Nakayama... All of the sudden he is prepared to do 100 or more laps. An excellent way to discover there still was plenty sharpness to gain on the edge, after all. And an open curtain for the Nakayama, because at that stage, they do offer excellent edge refinement on water only.
This post is only written because I believe in correct information, and I believe there is often too much hype going on about hones. I battle against it, whether that concerns Belgian or Japanese natural hones. This website supports Coticules for honing, but you are welcome with any other honing setup here, and we'll do our best the provide you with unbiased information to get the very best possible results.
Thanks for posting Justin,
Bart.