Testing NANIWA Chosera 10K The Most Expensive Stone - How Important to Flatten A New Stone B4 Using 

It's a big brick. Nice one.

Agree! 10K is good stuff. Good stuff never cheap. It has very good balance on cutting power, hardness, wearing down, tactile feedback and so on. Overall, worth to have it as very last finishing stone. Also amazing stuff for OCD. lol

@@tailibaba oh I am glad I spent the money and bought it. I have many and have used many different whetstone over the years and can not explain good enough to someone considering it how amazing it is other than to tell them just to buy it. Two I haven't tried that I would like to is the 4k Hayabusa and 8k fuji. I do have the 1k kurotu In that series and like it.

Thanks guys. Great info on the 10k. Two questions if you don’t mind. Can I go directly from a 3k Naniwa Professional to the 10K Naniwa professional.... I assume when you say Chosera that’s the, now renamed Naniwa Professional stones?

Chosera and Professional are the same quality. If you don't like the Chosera base and unable to remove it, you can get a Pro one. 3K to 10K ok for secondary edge.

sounds like a parrot that watched the terribly misinformed DURRfection video. There is no "setup stone" to the 10k. Naniwa themselves suggest you pick one finish, the 5k or the 10k. You'd think anyone that actually owns and uses such items would know this. The setup to the 10k would more naturally be the 3k, which is the finest sharpening stone, ideal deburring stone, in the chosera line. It is a really great stone, if I had to compare I'd say it's very similar to the 12k shapton pro, but takes more water and is more friable, but also it seems priced silly. 30 mm for $250 or you can get the same stone 15 mm, half thickness, for like $60. Doesn't make any sense. Ad

lol Nice one.

Hi! Thank you! Actually every stone has a so called "protecting layer" or "lacquer" on the surface. That has to be taken off before use. It feels very different with or without the "protecting layer". I use Atoma #400 grid. Any grid of diamond stone above this grid, it stucks very quickly. Difficult to move on the stone and difficult to separate from stone. Don't be afraid of #400 grid and #140. I prefer #140 actually. You just need to use #140 on #220 grid stone first, then #1000 grid stone, it's not that scratchy anymore. Almost no serif on high grid finishing stones. Remember never ever use brandnew #140 and #400 grid diamond stones on high grid stone. Go on low grid stones first, then middium grid. After this process, you are good on high grid stones.

I have Shapton Pro/Kuromaku 12k and im absolutely not satisfied🙏 The stone is death (lack of feedback and tactile feel is unpleasant).. In fact i dont even use it anymore

@@georgeyoung4292 just buy natural stone for the price....

You can try to make some mud slurry.

I suggest not to use a sharpening stone to flatten another sharpening stone.

Hi, I used to use top before. Then mark the name of the stone on the side. Now I use the back. Leave the marking in top. I feel the same. No different. But I always flatten the stone before use. Especially the edges.

Thank you! It's the same quality as the professional series. Thickness is about 34mm. Do you want the thick one?

@@tailibaba I generally prefer thicker stones but the only place I see them is on eBay with shipping from Japan. Unfortunately at higher prices plus I’d have to pay taxes on eBay too. Curious where you got yours? I’d rather order directly from Japan (without ebay). Thanks again!

@@wachinstuf I got this from Naniwa. I have 2 on stock. But I think shipping fee will be expensive. But if you are interested in it. I can check for you. You can compare and take whichever is cheaper.

@@tailibaba Sure, I live in the United States - New York. if you can give me an idea of price/shipping that would be great, thanks!

Sure. You find me on Instagram. Same name. We can send message there.

You mean the Nagura? It's Morihei Nagura.

@@tailibaba no i get it after flattening with the atoma 140. its almost like it leave some diamonds behind or something. stone always has some grit i can seem to get rid of immediately after flattening,

Ok. I never had it.

I think you mean the cabinet liner?

Atoma 400, right! No need to use any other stone to flattern another stone. Just use Atoma.

这些都太软了。试试龙虾和今西的砥石

@@tailibaba 好的，应该会试试今西。多谢。

@@tailibaba 在哪里可以买到今夕制砥？淘宝有吗？

我有一些存货

This one is made by Suehiro. Two sides but same #1000 grid. One side is traditional fired and the other side is made of Gokumyo method. Different feeling. Thinner side (Gokumyo) is finer as well. Can be a finishing stone.

@@tailibaba what if whetstone is Cerax 1000 only. If one side is warped can I just flip it over and use other side?

@@tailibaba You mean this Chosera is made by Suehiro? Please ckarify.

I would suggest that you flatten your stone.

This is actually Chosera #10000 grid.

Hi, Atoma #400 grid is almost good for almost all grids of stones. But sometimes it gets stuck when you work on high grid like above #5000 grid. For example, I would use Atoma #140 grid for #8000 grid. But one thing for sure, you don't need to worry about Atoma #400 working on #180 grid stone.

@@tailibaba Thanks mate. You're right there. I wouldn't bother for a #180 or #120 with a #400 Atoma.....

Thanks! If budge ok, get Atoma 400, and then stick 140 on the back. Then you are perfect. Never use Atoma 600 or 1200 to flatten a stone. It stick to the stone very quickly. Atoma 140 grid can do perfect flattening job as well. After you use it once, you don't need to worry about scratches on high grid stone. Super light scratches only.

@@tailibaba I flattened the stone ( Chosera #10000 ) just as you have done here and tried it out with VG10 and a Aogami Super knives. It's loading up (clogging) and forget about getting clean by rubbing fingers alone. Chosera cleaning stone had to be used. Have I been unloaded a copy stone because the packing itself was suspicious? Please answer my query. It also arrived with a big chunk of corner broken, still I decided to keep it thinking I'll use the intact part. But to this avail? A Naniwa stone that clogs up like a Naniwa Superstone?

@@oldwolf6091 Hi, the key is to keep the slurry on the stone and use it. The slurry is very helpful. How much did you spend on this stone? It comes with yellow fabric inside the box. One big light blue stone with a big cleaning stone.

It's a good stone. Just a bit expensive.

刀剑用这个厚的要小2000了

@@tailibaba 謝了

@@tailibaba 这个在那里购买的

这个我有两个存货

Almost for 10k. lol

@@tailibaba This stone is just under $300. Some natural whetstones are over $2000. Need to correct your title to "most expensive ceramic whetstone"

Yes, you are right! Thank you!

​@@jrcartoonz2141Most expansive synthetic stone

I've heard compound is actually toxic. And it's difficult to be cleaned. So I stopped using compound on kitchen knives.

@@tailibaba What do you use now? CBN? Diamond? What kind? Mono? Paste? Water solution? Oil solution? On what kind of substrate? Leather? Wood? I use .5 micron CBN on balsa wood. Followed with .1 diamond on buffalo leather.

@@jeffhicks8428 Fine leather on wood is good enough. Using different material for only increasing that slightly amount of sharpness doesn't bother me at all.