Naniwa 400
"Very good quality"
Shipping calculated at checkout.
The Naniwa Professional 400 grit stone is hardcore. It eats up steel so fast that it makes serious repairs & bevel-setting a dream. Naniwa Professional stones are harder than most, so they stay flat better and last much longer than cheaper options.
When to use this stone:
That said, always flatten your stone with a truing stone after sharpening.
| Stone Grit | 400 |
|---|---|
| Stone Size | 210x70x20mm |
| Manufacturer | Naniwa |
| Stone Family | Naniwa Professional |
| Stone Usage Prep | Splash and go |
About Naniwa - Naniwa is the biggest and best sharpening stone manufacturer in Japan. Their stones are among some of the highest quality in the world, good for both professional and amateur. They make a wide range of grits and densities, so you can choose the perfect stone for your needs and budget.
| Grit | |
|---|---|
| Stone Usage Prep | |
| Dimensions | 210 mm(L) x 70 mm(W) x 20 mm(H) |
| Series | Naniwa Chocera Pro |
| Brand | Naniwa |
| Made in |
We aim to ship your order within 1 business day at Knifewear, if there is a hold up, we'll aim to let you know and give you a timeline.
We offer $3 shipping on orders over $100* anywhere in Canada and $200* to customers in the USA. We ship worldwide, and offer up to the minute rates from our shipping partner DHL.
*Konro Grills and some other larger items are excluded from the free shipping offer.
How do I make a return on an online order?
No worries, we've got you sorted. Head over to https://knifewear.mom/returns and follow the prompts.
Can I pick up my order Curbside / At the store?
Absolutely, as long as all the items you are looking for are in stock at the location you want to pickup from, you'll be able to select that at the checkout. If one or more items aren't at your preferred location we are happy to ship it to you.

Overall rating: 4.964286 / 5 from 28 reviews.
Review topics: ["quality","material","stone","scratches","removes","knife","blade"].
"Very good quality"
"Best stone on the market for repairs"
"This is a great quality stone and is ideal to start your sharpening before moving on to 4000 or 1000."
"I bought this as an in between stone when thinning and it has been really great for taking out the larger scratches and has sped up my process a lot. I also use it to start sharpening the koba of a dull knife too. I find the feedback is great, it develops a burr quickly."
"This is my second time buying this stone, it's for a portable sharpening kit to keep in my vehicle along with a Naniwa Pro 1000 stone. This is splash and go, so you are sharpening right away, not waiting for the stone to soak. While there may not be as much feedback as a soaker, there is also no prep time, and no waiting for the stone to dry after use. This sharpens very quickly and you can get a serviceable edge on most knives without having to go any further, just adjust your pressure as needed. I always get my knives sharp on the first stone. Anything further is just edge refinement and polishing. For portable sharpening, you can find bins at the dollar-stores, along with a silicone sink tray to hold the stone. I added a piece of leather and a microfiber cloth for a truly portable sharpening kit. All of my stones and many of my knives have been purchased from Knifewear, they have always looked after me as a customer!"
"Love this knife for small jobs. It's so pretty, too!"
"Very nice stone, especially for very dull/damaged blades. I fixed a few of my in-laws blades while over for the holidays and they couldn't believe that I was able to salvage and make sharp one blade in particular."
"The stone gives a good and consistent result I am happy with."
"Pretty much the grand-daddy of all stones. This is your base-camp for climbing to the sharpest peaks in the world. It’s fast and durable and pretty much all you need for a sub-1000 grit in your collection for sharpening (other than maybe the KW 220 if you’re prone to chipping your knives). Get it!"
"So far so good. This stone seems quite hard and stays flat longer than my knifewear 220. Also leaves smaller scratches. It cuts a bit slower than the knifewear 220 and Sharpton glass 220, but seems to be a good starting stone for a dull carbon steel knife's Koba, as it's almost as fast and there's less work to get rid of the scratches after stepping up. For thinning it's pretty slow compared to either 220 stone, and the scratches are comparable to the Sharpton glass 220."