The Naniwa Super Stone line sits near the top of what Naniwa makes - high-quality ceramic compound stones at 20mm thickness that outlast most cheaper stones sold at 10mm. CKTG is the sole North American distributor. The ceramic formulation strikes a balance between polishing ability and durability: these stones tend to run on the softer side, which means they dish more readily than harder stones like the Shapton Pro but also feel more responsive and give better tactile feedback during sharpening. Splash-and-go use - no soaking required. Flatten regularly with a diamond plate when dishing develops.
The 400-grit Super Stone is the coarsest in the line and handles bevel setting, edge repair, and significant steel removal before transitioning up the grit progression. At 400 grit it cuts aggressively enough for serious reprofiling work while the Super Stone ceramic formulation keeps the scratch pattern cleaner than many coarse stones at this price. No soaking required - splash water on the surface and start sharpening. The softer bond means it refreshes readily under use, keeping the surface cutting actively. Flatten regularly; coarse stones dish faster than fine ones with sustained use.
What Customers Are Saying: Six reviewers confirm it cuts fast and is easy to use. Consistent feedback: good cutting speed for a 400-grit stone, straightforward splash-and-go performance, and reliable surface behavior that stays consistent through a session.
Care Instructions: Splash-and-go - no soaking required. Add water during sharpening as needed. Flatten with a diamond plate when dishing develops. Store dry.
The 400-grit Super Stone is the coarsest in the line and handles bevel setting, edge repair, and significant steel removal before transitioning up the grit progression. At 400 grit it cuts aggressively enough for serious reprofiling work while the Super Stone ceramic formulation keeps the scratch pattern cleaner than many coarse stones at this price. No soaking required - splash water on the surface and start sharpening. The softer bond means it refreshes readily under use, keeping the surface cutting actively. Flatten regularly; coarse stones dish faster than fine ones with sustained use.
What Customers Are Saying: Six reviewers confirm it cuts fast and is easy to use. Consistent feedback: good cutting speed for a 400-grit stone, straightforward splash-and-go performance, and reliable surface behavior that stays consistent through a session.
Care Instructions: Splash-and-go - no soaking required. Add water during sharpening as needed. Flatten with a diamond plate when dishing develops. Store dry.
- Brand: Naniwa
- Line: Super Stone
- Grit: 400
- Use: Splash and Go (no soaking)
- Thickness: 20mm
- Dimensions: 210mm x 70mm x 20mm
- Origin: Japan
- Note: CKTG is sole North American distributor
Reviews
6 review(s) WRITE A REVIEW (Reviews are subject to approval)
Fantastic Stone
400 NaniwaPosted By: HPHH - verified customer
27 people found this review helpful
It didn't cut as fast as I was hoping for but, for the price, it's hard to complain. If you absolutely must have an aggressive stone, this isn't it, but for the vast majority of your needs on a low grit like 400, it does the trick and does what it says it does.
27 people found this review helpful
It didn't cut as fast as I was hoping for but, for the price, it's hard to complain. If you absolutely must have an aggressive stone, this isn't it, but for the vast majority of your needs on a low grit like 400, it does the trick and does what it says it does.
Naniwa Super Stone 400 Wonderful!Posted By: Bryce M - verified customer
28 people found this review helpful
I was a bit impatient to receive my products, however they arrived very quickly. The staff was very helpful as well. This stone has the feel of a little higher grit range however it will bring even the worst of dull knives back from dead. Make sure you know your angles and pressure when sharpening a knife as this stone does its work quickly. The packaging was wonderful and I probably could ha e punted the box across the yard and still not damaged the contents. The thin packing paper makes for a wonderful sharpness test when you finish sharpening. Will definitely return for future business.
28 people found this review helpful
I was a bit impatient to receive my products, however they arrived very quickly. The staff was very helpful as well. This stone has the feel of a little higher grit range however it will bring even the worst of dull knives back from dead. Make sure you know your angles and pressure when sharpening a knife as this stone does its work quickly. The packaging was wonderful and I probably could ha e punted the box across the yard and still not damaged the contents. The thin packing paper makes for a wonderful sharpness test when you finish sharpening. Will definitely return for future business.
Fantastic to have in class
Not bad, not a 400Posted By: Matt F.
64 people found this review helpful
This is not a bad stone in general. But it's extremely slow if you think of it as a 400. A lot of the more astute reviewers out there put it more at about the 800 level and I would agree with that. I've found I need a lot of passes to reset a bevel and that's for some pretty soft steels. I'm not calling anyone who has a different opinion a liar but that's been my experience. It just doesn't cut like other 400s I've used. If you want to use a stone in the 200 to 300 range and then use this as a next step it might be ideal. I'm no expert but I'm a pretty quick study and I'm not the only person who thinks this. Take it for what you think it's worth.
64 people found this review helpful
This is not a bad stone in general. But it's extremely slow if you think of it as a 400. A lot of the more astute reviewers out there put it more at about the 800 level and I would agree with that. I've found I need a lot of passes to reset a bevel and that's for some pretty soft steels. I'm not calling anyone who has a different opinion a liar but that's been my experience. It just doesn't cut like other 400s I've used. If you want to use a stone in the 200 to 300 range and then use this as a next step it might be ideal. I'm no expert but I'm a pretty quick study and I'm not the only person who thinks this. Take it for what you think it's worth.
