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Ozuku Asagi (Koppa)
Ozuku Asagi (Koppa) Ozuku Asagi (Koppa)Ozuku Asagi (Koppa)Ozuku Asagi (Koppa)
Ozuku Asagi (Koppa) Ozuku Asagi (Koppa)Ozuku Asagi (Koppa)Ozuku Asagi (Koppa)

Ozuku Asagi (Koppa)

Item #: Ozukukoppa

Average Customer Rating:
(5 out of 5 based on 27 reviews)

Read Reviews | Write a Review
Our Price: $75.00
Availability: Usually ships the same business day
Qty:
Mikawa Shima Nagura Medium Size
$22.95
Quantity:
Usually ships the same business day
Please note. These stones are irregular sizes and shapes with inclusions, imperfections, cracks, pits etc. Don't buy it if you want perfection. We sell full sized Ozukus that are high quality stones for 4 times as much and if you want "a good one" get one of those. We won't cherry pick them so buyer beware. This is my lame attempt to lower expectations. I hope you heed my warning so I don't get unhappy customers. Sermon over.

We sell a lot of these stones primarily to razor sharpeners. The stones come in a variety of sizes and shapes. They tend to last a long time since the stones are dense and hard and cut slowly. My guess is these stones are about 15k-20k.

Customer Reviews

Product Reviews

5  A nice surprise , November 11, 2019
Posted By: Michael

I was very pleased when receiving this ozuku. I ordered it to finish straight razors & mine was 3 inches wide which was perfect! It was not flat enough, but I enjoy the process of preparing a stone. So about 30 minutes of work & it was good to go. I tried it out on a razor I shave with most, it has always had a synthetic edge. It only took a few strokes for me to realize the difference in smoothness. My synthetic edge was good but this japanese natural gave it an extra keeness I really liked. I have not tried this on my knives yet, but for a razor I love it!

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5  Ozuku, August 29, 2019
Posted By: Nik - verified customer

The quality of this stone is wonderful. I bought one before that I primarily used for razors. My second I am using for cutlery. I am also on the waiting list again for another one. They all surprise me. Sometimes you have to do a bit of lapping to get a nice surface for honing but it is a hard stone. I love the people here and their products.

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5  Excellent , August 15, 2019
Posted By: Sean - verified customer

Excellent,I like this

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5  Japanese Koppa stone, April 25, 2019
Posted By: steve p. - verified customer

Best stone I have bought at the size near 3" by 6 " of usable surface which is fine enough for knives and straight razors. It is very smooth and gets the razor very fine for shaving.

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5  Excellent stone, April 13, 2018
Posted By: Jeronimo

This is a wonderful stone, much larger than I anticipated. It left a great finish on my razor and I now have very comfortable shaves. I am so glad I was able to get the stone this time around. Missed it several times now. Mark was great and patient with my questions, outstanding service. Great buy at a great price.

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5  Great razor hone, January 21, 2018
Posted By: Jeff T - verified customer

Great straight razor hone. I set an alert so I knew when these stones were available. Ordered ray soon as I was alerted. Honed my razors to 8 k Morton, then to ozuku. Got amazing shaves. Stone is a bit irregular, but mostly rectangular in shape. Not disappointed. Not perfect but you also arent spending 200.00 for a rock. If youre using this for razors I dont think youll be disappointed if youre looking for a good value.

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3  Weird honing surface, November 16, 2017
Posted By: Christian - verified customer
3 people found this review helpful

The stone I received had cracks/chips was not very flat. I could not get 2-3 inches of a stroke in without something in stone interfering. If stone was lapped down more or had some bits cut off it would be usable but I just don't have the tools for this. My expectations were not high but I feel this was a bit unreasonable. For the price if it my stone had just a bit more surface I could work with it would have been great deal.

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5  Ozuku Asagi Koppa, November 6, 2017
Posted By: Jason L - verified customer

I'm new to the whole in at thing but this stone has exceeded my expectations in every way. I tried not to get my hopes up too high so I was very surprised when I opened the box. MUCH larger than I expected. Shipping was also very fast. I like this one so much that I will probably try to get another.

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5  Get one when you can, October 30, 2017
Posted By: William - verified customer

I am a luthier and purchased the stone as a finisher for my Chiyozuru Sadahide kiridashi and other Japanese woodworking tools I use. It exceeded my expectations. Beauty in form and function.

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5  Perfect finisher, August 1, 2017
Posted By: Independence Razor - verified customer
2 people found this review helpful

Stone exceeded by expectations in every way: bigger, flatter, harder, smoother, better.

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5  Every bit as good as they say, July 22, 2017
Posted By: Independence Razor - verified customer

Everything about this stone was exceptional: very large, hard, fine, and flat. Beats a Nakayama I paid much more by a long shot. Service was fast and courteous. I am going right back in the waiting list for the next batch.

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5  Highly recommended !, March 20, 2017
Posted By: Aldis - verified customer

Beautiful rock, as expected .Very satisfied!!! great customer service! thank you:)

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5  Jnat, March 19, 2017
Posted By: Marv - verified customer
1 people found this review helpful

Dr. Matt was right this is one great buy for the money. It was well worth the wait. Very little prep and the stone really delivered. As a finisher you can't beat it as I got a very sharp edge that gave me a smooth shave in all directions. Very good addition to my other stones. I recommend this jnat to anyone.

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5  Ozuku Asagi (koppa), March 19, 2017
Posted By: Vito Passero - verified customer

As always Mark's help is outstanding as are his products.The KOPPA stone a wonderful finisher, feed back while you're using it. Feel is great! Does a splendid job. Mirror finish!

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5  Awesome stone!, October 25, 2016
Posted By: George Campbell - verified customer
1 people found this review helpful

One heck of a stone! It's definitely one of most favorite finishers!! Like my friend Matt says, it's the biggest bang for the buck. I'll deffinately recommend it to anyone and I'd surely buy another one! !

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5  Ozuku, July 16, 2016
Posted By: Nicholas - verified customer

Perfect stone for those who want a new or first jnat finishing stone without having to spend toop much pocket money. The first stone I purchased is a nice finisher, it creates a really beautiful gloss to the edge while keeping it butter smooth and sharp. I haven't used it with anything but straight razors yet. But I figure using it to refresh a knife or even hair styling sheers would get the job done correctly.

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4  Fun stuff!, May 29, 2015
Posted By: Max S. - verified customer

I've always wanted to try a high grit natural Jap stone, when I saw they had one in stock I jumped on it! I've never had a problem using small stones on my knives, or stones that aren't perfectly flat. I am pretty good at working around issues like that. My stone is not square, upper left is missing a huge chunk, so is the lower right, if this stone was proper sized and shaped, i'm sure it would cost a lot more money. When I started with it, I used a lot of water and the stone really did not do much. I decided to use a tiny drop of water and it worked better, a little slurry with a diamond stone is nice too. The stone produces a very very fine white mud, which immediately turns shiny black while honing. I have yet to get a polish that looks like "10-15K" but the edges coming off this stone are insane! super smooth. I can see why razor honers like these. I say try it! 4 out of 5 stars because of inclusions and irregular shape. Good Purchase

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5  Product Review, April 16, 2013
Posted By: Jerry - verified customer

I recently bought two of these asagi koppas to use as tomonagura for each other for my razors. Well, one stone is much harder than the other one. So, now I have a prepolisher and a finisher. What a great deal!

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5  Product Review, November 6, 2012
Posted By: mark zervoudakis - verified customer

I ordered this stone to see what all the fuss was about. As it is at the cheaper end of J-nat prices I wasn't expecting much. Up till now I have been largely satisfied with my kitiyama as a finisher but I never could get the edge I really wanted. I have now just honed two knives as a test - one in white#1 and the other in blue super - the results for both have been instant and dramatic. With little or no slurry the stone quickly took the kitiyama level of finish to a whole new level. This stone cuts fast and smooth and while being quite hard actually has a buttery feel. This is completely different to say a ark translucent which is extremely slow to cut and glassy on hard steels. I am very impressed with the feedback and results for such a cheap J-nat and would definatey recommend this to anyone who wants to find that next level of keeness at a reasonable price. Obviously it won't make a dull knife sharp but if you are not entirely happy with what your current finisher is doing for you then definately grab one of these babies. cheers mark

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5  Product Review, June 6, 2012
Posted By: Bullman - verified customer

I will not live without this stone I would actually get in a bidding war if their was only on left in the world it is that good, beautiful edges is the only way to describe it.

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5  Product Review, May 31, 2012
Posted By: Tim - verified customer

I just got this stone in last night and tried it out a bit today. I tried it on a Tojiro ITK 210mm, Itossai Hidatool 210mm Santoku and a Tanaka Kurouchi Blue #2 Nakiri I got from CKTG. It really refined the edge from the ITK and Santoku very nicely and put a smooth but bitey edge on those blades. On the Tanaka, it was sick. Never had an edge that sharp or aggressive, yet still smooth in the cut! It also worked on my Artifex and Addict2, but those edges weren't as sharp as the others to begin with. I just got a few minutes to play with it, but in that time, I fell in love with it!!

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5  Product Review, September 26, 2011
Posted By: Aaron - verified customer

Good things do come in small packages. This stone is no exception. Glass smooth and hard. A nagura is a must for this if you ask me. The finish is great, best edge off the stone I've ever had. When you first start to use it it starts out at a 8-10k but when you use just the weight of the knife and the mud, it goes up to 15 or even 20K finish. Great stone and as usual great service from Mark.

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5  Product Review, April 24, 2011
Posted By: Bob Nitchke - verified customer

First I must say that the shipping was as fast as any I've seen. Next the stone was above my expectations,I can't add much to the reviews above but if you want to try a jnat this stone would be a great start at a bargain price. I'm glad I bought it.

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5  Product Review, March 25, 2011
Posted By: Rob Babcock - verified customer

A quick update: This one works very, very well on SG-2 and VG-10 as well. The traditionalists will probably wince but I've had great results raising a bit of slurry with the DMT. I like sharpening on it immediately after flattening it. It cuts surprisingly fast and leaves a great polish behind.One remarkable thing about this stone is the smooth-yet-grabby bite it gives an edge. Before I started getting into J-nats the Naniwa Chocera 10k was the only stone I'd seen that creates this effect. There's no easy way to compare the stones as they're quite different but I can say that they're very comparable in quality and the type of cutting performance (not necessarily appearance, though) they give. Considering the Ozuku Asagi is about 1/4 the price of the 10k Chocera I'd say it's quite a bargain. It's done a very good job on all the steels I've tried it on. And it works especially well following the Tanaka natural Aoto I recently acquired.Highly recommended for those looking into getting into a natural Shiageto without breaking the bank.

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5  Product Review, February 23, 2011
Posted By: Rob Babcock - verified customer

I love this stone! It does a very nice job of polishing, and it works very well for tool steels, too. For kitchen knives I can't imagine many people needing to go any higher in polish than this (grit range wise). It does wear pretty slowly and isn't quick to build up any slurry...perhaps I'll have to get a nagura.Overall a very fine stone. I can't wait to try it out on more types of steel.

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5  Product Review, July 5, 2010
Posted By: Stefan - verified customer

Another high quality, broad range stone suitable both for knife and razor.the stone is hard and with buttery feel to it.It is fully capable to take 1k edge all the way to the 8-10k where I estimate it to be at its finest.For regular knife sharpening this would be a final stone in a progression of two.If one wants to go higher , then this is the perfect stone to use as pre-polisher.Amazingly good price for the quality you get.

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5  Product Review, July 5, 2010
Posted By: Stefan - verified customer

One of the best purchases I have made.The stone is ideal for polishing knives up to 10k finish, or as prepolisher for a high grit polishing stone.The stone is very fast and capable of taking 1k edge all the way to its potential at 8-10k.The stone feels buttery smooth, and is rather hard and slow wearing.Again great buy at a bargain price.

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