Please note that Naniwa changed the name of this stone from the Super 8,000 to the Advance 8,000.
There is a wide variety of very fine waterstones on the market today, and each brand has unique characteristics that give it advantages in different situations. These Naniwa Super Stones from Japan are designed to allow you to sharpen quickly and with a minimum of maintenance. The latest version of these stones is resin-based, so they do not need to be (and should not be) soaked before use. Just a splash of water is all that is required to get you started.
Unlike some of the other resin-based stones on the market, the Naniwa Super Stones will stay flat for a reasonable amount of use, but are soft enough to be easily flattened by traditional flattening stones or diamond plates. Another great advantage of these stones is that their abrasive is formulated so that it easily breaks down in use to give a very smooth sharpening gradient. This 8,000 stone is a wonderful final stage for most knives. We believe it’s a great way to get professional results at the end of your sharpening or reshaping regimen.
The stones are 20 mm thick and do not come on a solid plastic base. They are a US-exclusive CKTG item. At 0.75” thick, these stones will last for years of average use.
There is a wide variety of very fine waterstones on the market today, and each brand has unique characteristics that give it advantages in different situations. These Naniwa Super Stones from Japan are designed to allow you to sharpen quickly and with a minimum of maintenance. The latest version of these stones is resin-based, so they do not need to be (and should not be) soaked before use. Just a splash of water is all that is required to get you started.
Unlike some of the other resin-based stones on the market, the Naniwa Super Stones will stay flat for a reasonable amount of use, but are soft enough to be easily flattened by traditional flattening stones or diamond plates. Another great advantage of these stones is that their abrasive is formulated so that it easily breaks down in use to give a very smooth sharpening gradient. This 8,000 stone is a wonderful final stage for most knives. We believe it’s a great way to get professional results at the end of your sharpening or reshaping regimen.
The stones are 20 mm thick and do not come on a solid plastic base. They are a US-exclusive CKTG item. At 0.75” thick, these stones will last for years of average use.
Reviews
4 review(s) WRITE A REVIEW (Reviews are subject to approval)
Naniwa "Advance" 8k, February 14, 2026Posted By: Ryan R
I usually wait at least a few months to leave reviews for stones until I've really had a chance to put them through their paces. I have 2 other stones from this line to compare it to, a 3k "Super Stone" marked stone on a stand that came in the green, Kanji marked box, and a 12k "Gouken Kagayaki" stone for my razors. Apparently the Kagayaki are the Japanese domestic version of these, but after using this I'm not so sure they're identical. I can't say without buying the exact same grit which I'm not going to do. But compared to those, this 8k Advance is significantly harder, doesn't load quite as heavily, and has a slightly different feeling and feedback. It still has the "really hard eraser" feeling that fans of the Super Stones are familiar with, though. It seems to get the job done fast for such a fine stone. It holds water on the surface much better than the Kagayaki, which oddly kind of lets water fall through it like a coarse soaking stone and overall the Advance just feels harder and denser. The edges I'm getting off of this 8k are insane. I've owned 4 other 8ks, so it's not like I've always used a 1k and I'm now blown away by my first 8k. Honestly, some of the keenest edges I've ever produced in about 2 decades of sharpening. It produces a mirror finish and edges that wittle free hanging hair effortlessly without ever touching a strop. I have no doubt I could finish my razor on this and get a good shave. I'm very happy with it, and as always from ChefKnivesToGo, it was packed very well and shipped quickly. It looks like I have a new favorite 8k
I usually wait at least a few months to leave reviews for stones until I've really had a chance to put them through their paces. I have 2 other stones from this line to compare it to, a 3k "Super Stone" marked stone on a stand that came in the green, Kanji marked box, and a 12k "Gouken Kagayaki" stone for my razors. Apparently the Kagayaki are the Japanese domestic version of these, but after using this I'm not so sure they're identical. I can't say without buying the exact same grit which I'm not going to do. But compared to those, this 8k Advance is significantly harder, doesn't load quite as heavily, and has a slightly different feeling and feedback. It still has the "really hard eraser" feeling that fans of the Super Stones are familiar with, though. It seems to get the job done fast for such a fine stone. It holds water on the surface much better than the Kagayaki, which oddly kind of lets water fall through it like a coarse soaking stone and overall the Advance just feels harder and denser. The edges I'm getting off of this 8k are insane. I've owned 4 other 8ks, so it's not like I've always used a 1k and I'm now blown away by my first 8k. Honestly, some of the keenest edges I've ever produced in about 2 decades of sharpening. It produces a mirror finish and edges that wittle free hanging hair effortlessly without ever touching a strop. I have no doubt I could finish my razor on this and get a good shave. I'm very happy with it, and as always from ChefKnivesToGo, it was packed very well and shipped quickly. It looks like I have a new favorite 8k
Naniwa 8k Superstone
Good stone but..Posted By: Vinny nero - verified customer
32 people found this review helpful
This is a really nice fine stone that I use to strop my knives on. The only problem I have with it is the amount of loading the stone takes on its surface. I find myself needing to clean the stone about 2 maybe 3 times to finish a knife cause the cut speed drops substantially. Other then that it's a really good stone. It's a very fine stone for the money you pay. All and all I'm happy with it
32 people found this review helpful
This is a really nice fine stone that I use to strop my knives on. The only problem I have with it is the amount of loading the stone takes on its surface. I find myself needing to clean the stone about 2 maybe 3 times to finish a knife cause the cut speed drops substantially. Other then that it's a really good stone. It's a very fine stone for the money you pay. All and all I'm happy with it
delicious Posted By: MAX SAVINO - verified customer
32 people found this review helpful
Bright yellow color is just great. The creamiest feedback of the super stone line. For doing razors, this is your refresh stone/pre polisher to a natural finish. In a synthetic progression at this stage things really come along. It is quite soft, and not at all muddy. Absolute please to use. Very fun slurry if you wish to sharpen with some. A regular use tool for me.
32 people found this review helpful
Bright yellow color is just great. The creamiest feedback of the super stone line. For doing razors, this is your refresh stone/pre polisher to a natural finish. In a synthetic progression at this stage things really come along. It is quite soft, and not at all muddy. Absolute please to use. Very fun slurry if you wish to sharpen with some. A regular use tool for me.
