NANIWANK-2250 Professional Whetstone Kagayaki #5000 Sharpener with Storage Case 8.3 x 2.8 x 0.8 inches (210 x 70 x 20 mm)

I ordered the 5000 but I also have the Naniwa Superstone 8000 (they are the same) and I enjoy both stones a lot. I use them mainly for razor honing but they're all around excellent polishers. Some people are talking about load up which can be an "issue" for these stones but not exactly. The loading helps the stone polish more vs cutting more. If you dislike the loading the best thing to do is create a little bit of slurry with a diamond plate or something else, that slurry will keep the stone clean / free from loading.One issue I have is due to the dry climate I live in this stone and the superstone like to warp / move around when they're drying. I felt like I was going crazy because I was positive I flattened the stone before I put it away and the next time I use it its nowhere near flat anymore. I found a solution to that issue but Naniwa doesn't approve of my solution. These are resinoid stones, resinoid stones can be perma soaked (Naniwa says they cant but other stone manufacturers that make resinoid stones say they can). After some research I reached out to another manufacturer that produces resinoid stones and they told me, at my own risk, I could definitely get away with perma soaking these stones. The person stated they have Naniwa superstones as well and they've perma soaked them for years.I am now going on a year of having the stones soaking in water non stop and the stone hasn't started falling apart or anything, they do get a tiny bit softer but I enjoy it because they dont have as much of a plasticy feel to them. The issue with resinoid stones and soaking isn't the water itself its the drying. Being soaked in water doesn't hurt the stones but when you take a resinoid stone that is wet and dry it out, the stone dries at an uneven rate due to the makeup of the stone itself. This uneven drying is what was causing the warping problem I faced but it can also cause the stone to start cracking / crazing and eventually fall apart if the stone was soaked or it was wet for a really long session of polishing.So in short, if you have an issue with these stones not staying flat you can perma soak them if you have space for that. If you ever need to dry them out after soaking for a long time then make sure you dry them very very slowly such as putting a wet paper towel around them and placing them in a plastic bag that has a small opening so you can control the rate of drying.Overall, these are some of the best razor honing stones money can buy imo.

6000番→この砥石と研いだら、写った時計の文字が読めた。　研ぎが進むと、かなり貼りつきやすいので名倉で研ぎ汁を出したり、前の研ぎ汁を残しておいてまめにかけながら研いだ方が良い。

まずは、こちらはレジノイド砥石です。柔らかく、平面維持性は控えめ。そこら辺の使い分けは最低限弁えて使う事をお勧めします。輝シリーズはこれで4本目(今まで#220、#800、#2,000)で、今回#10,000と併せて購入しました。目的としては切刃の更なる光沢を求めて。結果はとても研ぎ易く、ピカールで磨いた様な光沢と共に切れ味も向上。#10,000まで行けばピカールレベルですが、中砥(#1,000〜2,000位)から直接行くと時間と労力的にキツいのでやっぱり#4,000か#5,000を挟んでおいた方がめっちゃ楽ですね。難点(になるかは好み次第)ですが、小刃をこの砥石で研ぐとすると、柔らかいので力を入れ過ぎると蛤刃になりやすいと思います。また、私はやりませんでしたが刃物が砥石を抉ることがあるとかないとか。私は小刃付けは天然砥石でやってるのであまり関係ないかと読み飛ばしましたが、あるのか？うーん。

The best 12o bang for hint buck on the market. Great finish stone for straight razors.

The product description at time of writing this review is a bit confusing. I received a 20mm 8000 grit yellow Naniwa stone. I wasn't sure what I would receive but the price was good enough to take a chance. This is my first Naniwa stone and is a nice addition at 8000 grit to my range of Shapton stones.