Why all of the hype around Aoto?

Miura knives
Shop Knives and stones on ebay
Advertise with us
Kitchen Knife Forums

Help Support Kitchen Knife Forums:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Miyamoto Musashi

Miyamoto Musashi

Well-Known Member
Joined
Jun 17, 2022
Messages
180
Reaction score
131
Location
US
From what I’ve read and based on my own experience, it’s not a fantastic polishers and there is a large variance from stone to stone?

I’m not knocking on Aoto, and as far as naturals go, I have a long way to go. Just want to learn why they are so coveted. Do you think it’s mainly due to low supply? Would love to hear from the most elite stoners.
 
Last edited:
There are a lot of bad aotos out there unfortunately. Too soft, too thirsty, too scratchy, bleh. On these forums the good ones are most coveted for their kitchen-based edges rather than their polishes. Traditionally though they were the quintessential working man’s stone in Japan.
 
I probably wouldn't use one even if i got one for free.

in the low/mid grit range synths do things much faster and cheaper. and you know what you get. exactly.

jnats are good for finishing imo and thats it. same with coticules.
 
Aotos are often really easy to use, and can make their own slurry just from putting a knife on them. They're an easy stone for beginners to understand. Plus, playing in the mud is just fun.

I admit, though, that I've sidelined my aotos, and my Tsushima bench stone has entirely usurped their place in the sequence.
 
I've been curious about these too. I picked up a cheaper narrow aoto to try one.

IMG_20220619_123849525~2.jpg


It is coarser than my other jnats bur also seems to have wide distribution of particle size. I'm a very average polisher but to me as echoed above it is not well suited for this and leaves some stray coarse scratches almost at a 500 grit. But then when used for the edge it feels much finer but still very aggressive. More like an agressive 3000 synthetic. It's not easy to see in the picture but mine has many small red/brown inclusions across the surface that I think might be releasing the coarse grits. I like the edges off it and am keen to test it as a nagura type stone on finer synths.

Edited to add it is also thirsty and muddier than my other jnats. Self slurries quickly too.
 
The hard aoto with diamond slurry can be pretty great polishers.

Aoto are the most famous midgrit jnat, so that's why. Uh

Read kiyonds blog. He has more info about aoto, and reviews on like 30 different aoto with pictures and video
 
Well I still love mine. It puts a great edge on a kitchen knife. I'm less drawn to the contrast for polishing, where there are more options.
 
I got three of them, and only one is suitable of polishing with nice contrast. The last one i got produces deep scratches because it seems to have bad inclusions. If i sharpen with it, it is really fast for a jnat and leaves a nice edge and i could ez finish up with my hideriyama. Ill never get another one again, if i could chose i would rather go synth or take an aizu or so
 
From my limited experience, i've seen and used stones called aoto that are completely different beasts.

Usually green aotos are finer and much less abrasive being more similar to Atagoyamas.
https://www.japanesenaturalstones.com/green-aoto-a2283/https://www.kitchenknifeforums.com/threads/fs-green-aoto-ohira-renge-suita.18603/#post-304558
Red aotos seem to be, in general, a bit softer than green aotos, but also more similar to Atagoyamas than "real aotos".
https://www.japanesenaturalstones.com/red-aoto-a2026/
What i call real aotos would be the ones that are usually called blue aotos, but even among those there are horrible and excelent specimens. Some hard, others very soft.

When i started using these real aotos, i was told by an expert on jnats that these aotos have layers and the stones should be cut in a way so that the working surface would show various layers (just like end grain wood boards). Unfortunately, it seems that some aotos are cut so that the there is only one layer visible, paralel to the working surface (alongside the grain) because this kind of cut produce wider working surfaces given a thinner slab, extracted from the mine. The result of such cuts where the working surface shows only one layer is that the stone feels softer and muddier, and would be much slower. The picture below shows the side of one well-cut aoto. Notice how the layers are running top-bottom.

1655618890181.png


Anyway, the ultimate test comes from using the stone. There's no substitute for that.
My opinion on aotos is that a good one leaves a toothier edge and is much faster than most jnats. So, if you are into jnats, i would definitely try one.
 
I have two hard blue aotos, which are quite similar, and a softer brownish, greenish one. The blues are similar to Aizu. It doesn't really make sense to have both.
 
I have had two Aizus, but both felt different from my blue aotos, which are faster, coarser and more abrasive than both aizus i tried.
Then again, blue aotos can be very different.
 
Marcelo Amaral said:
From my limited experience, i've seen and used stones called aoto that are completely different beasts.

Usually green aotos are finer and much less abrasive being more similar to Atagoyamas.
https://www.japanesenaturalstones.com/green-aoto-a2283/https://www.kitchenknifeforums.com/threads/fs-green-aoto-ohira-renge-suita.18603/#post-304558
Red aotos seem to be, in general, a bit softer than green aotos, but also more similar to Atagoyamas than "real aotos".
https://www.japanesenaturalstones.com/red-aoto-a2026/
What i call real aotos would be the ones that are usually called blue aotos, but even among those there are horrible and excelent specimens. Some hard, others very soft.
Click to expand...

You are right. The red and green aotos Maksim had 7-8 years ago were not real aotos but were atagoyamas from the akapin layer. I think he just called them aotos because there were similar in "grit" and feeling to aotos. I know as I have both aotos and a red and green "aoto" from way back :)
 
4wa1l said:
I've been curious about these too. I picked up a cheaper narrow aoto to try one.

View attachment 184982

It is coarser than my other jnats bur also seems to have wide distribution of particle size. I'm a very average polisher but to me as echoed above it is not well suited for this and leaves some stray coarse scratches almost at a 500 grit. But then when used for the edge it feels much finer but still very aggressive. More like an agressive 3000 synthetic. It's not easy to see in the picture but mine has many small red/brown inclusions across the surface that I think might be releasing the coarse grits. I like the edges off it and am keen to test it as a nagura type stone on finer synths.

Edited to add it is also thirsty and muddier than my other jnats. Self slurries quickly too.
Click to expand...
musicman980 said:
There are a lot of bad aotos out there unfortunately. Too soft, too thirsty, too scratchy, bleh. On these forums the good ones are most coveted for their kitchen-based edges rather than their polishes. Traditionally though they were the quintessential working man’s stone in Japan.
Click to expand...

I’m out of town at the moment but when I get back I’ll post some pictures/the finish on a project knife I have coming in the mail soon. Would love to hear people’ thoughts. It’s very thirsty and muddy.
 
refcast said:
The hard aoto with diamond slurry can be pretty great polishers.

Aoto are the most famous midgrit jnat, so that's why. Uh

Read kiyonds blog. He has more info about aoto, and reviews on like 30 different aoto with pictures and video
Click to expand...


I googled “Kiyonds blog” but couldn’t find anything. Could you share a link?
 
Olsen said:
You are right. The red and green aotos Maksim had 7-8 years ago were not real aotos but were atagoyamas from the akapin layer. I think he just called them aotos because there were similar in "grit" and feeling to aotos. I know as I have both aotos and a red and green "aoto" from way back :)
Click to expand...

Maksim is a great seller and has always pointed this out. I have also come across to a red and a green aoto from him that i like.
 
Ethan said:
Were Aoto amongst the first natural stones that the western demographic became familiar with?
Click to expand...
They were one of the first few that I heard of.

Aoto, Suita, Asagi were the first names I remember hearing when I got in the game.

I specifically remember reading a post that was titled something like This is why an Aoto edge is best for Gyutos, and was about someone machine gunning onions or something.

Back when I was trying to figure out “what grit to sharpen my chefs knife” the Aoto idea intrigued me but no way was I going to spend THAT much on a stone.
Got me into looking for synthetic Aotos. Like the famous synthetic Blue Aoto that was very hit or miss on the forums.

Close to a decade later, I’m sitting on an Aizu, Both Red and Blue JNS synthetic Aotos, as well as a Khao Men. Maybe all of the propaganda has got to me, or maybe there is something to the grit range. No real Aoto tho.
 
🙋‍♂️🙋‍♂️🙋‍♂️ ME! PICK ME!! I KNOW THE ANSWER!!!

Is it because unlike the overwhelming majority of Japanese natural stones they're actually ok at abrading hard steel...?


[Puts more serious, non-flippant hat on]

I actually rather liked the few Aoto I've tried. They feel very nice, sharpen relatively well, and leave good, bitey edges. I also find they do interesting things for polishing; while they leave a noticeable scratch pattern, underneath that is quite a high shine (notably moreso than other stones around the same 'grit' level), and they can be very good in a progression to help highlight banding in cladding.

The big reason though is this:

Marcelo Amaral said:
My opinion on aotos is that a good one leaves a toothier edge and is much faster than most jnats.
Click to expand...

And if you absolutely had to use a jnat for sharpening a kitchen knife, then an Aoto is probably your best bet.
 
The one I have is relatively easy and enjoyable to use. Maybe the average ones are not the greatest polishers, but I’m sure they exist. It’s great for edges, as the scratch pattern other have mentioned might hint at. I believe I ended up with a good one that’s not too hard and not too soft, cuts well and has a somewhat tighter grit consistency.

I also wanted one since the beginning of my jnat journey, both due to hype and seemingly appropriate for kitchen edges. 15 stones later I finally get one. Granted other stones I’ve found may do a better job prepolishing or creating grabby edges, but the whole package is fun, useful and quite satisfying.

Oh, and they smell quite different from other jnat. It’s all part of the mystique and enjoyment, imo.

Big, slightly scratchy contrast, for good measure.
3369626B-C2CE-4F71-9189-DFD5A9E0666D.jpeg
 
Last edited:
Damn i wish that my aoto would be like that. I got two redish aotos, one produces a very uniform scratch pattern, the other one is the one with inclusions which will scratch too much. The other one is a real hard aoto, barely mud and produces no contrast at all. That one is cool if you wanna do a mirrorpolish
 
the soft coarse aotos with suji are pretty ****, they're like 1-2k grit range with no real abrasive power and lots of scratchy particles. there are exceptions of course - a well known case are kouzaki aoto which are known to be much finer and harder than standard
 
You must log in or register to reply here.

Latest posts

Back
Top