Naniwa Professional Sharpening Stone | #400 Grit
This Naniwa Professional Sharpening Stone with #400 grit is ideal for sharpening kitchen knives and other blades, providing 30% faster cutting than Super Stones and excellent performance on the hardest steels. It requires only a light soaking for effective use and lasts 2x longer for time-saving upkeep.
This professional sharpening stone is a trusted choice for experienced craftspeople who demand quick sharpening, maximum longevity, and superior performance. With a durable rubber base and superior cutting speed, it offers reliable sharpening with increased accuracy.
We stock a range of Naniwa products for knife sharpening. They have become the gold standard for excellent quality abrasive stones designed for professional chefs. If you love Japanese steel, choosing Naniwa stones is your best bet for sharper edges.
For Australian customers:
We offer $9 flat-rate Shipping Australia-wide.
For all domestic orders, we use Australia Post where current delivery times are 2 to 5 days.
If the knife is for a birthday, give us a call and we will upgrade to express at no additional cost.
For overseas customers:
We offer $29AUD flat-rate shipping for all regions (larger orders are rewarded by keeping the shipping cost fixed).
For overseas shipping, we use DHL or TNT, the two biggest transport companies in the world (The German's versus the Dutch). Delivery times tend to vary from a week to a month, however we do provide tracking information for clarity.
Any issues or problems let us know. If it doesn't arrive then we will refund you or re-make and re-send.
Koi knives are made by a small team passionate about what they make.
We do not have a full warranty for everything.
We make the knife and we are responsible for how the product is made. If there are any product issues related to how it’s made we take full responsibility.
Once you take the knife you are responsible for looking after it. To be clear we look at how other passionate makers work with their clients - like those who make Ferraris.
If you invest in a Ferrari you need to take care of it, wash it, service every so often. You need to treat it with love, with the same passion it was made.
If you buy a Ferrari, ignore reading the manual, drive around your local cow farm through the mud and undulating landscape. Leave it by the seaside where the salt comes in from the sea. Don’t service your car. What will happen?
Can you bring it back to the car dealership 6 months later and ask for a refund? What would they do??
We are no different. If it’s a product problem we will fix it or we will replace it at no charge. If you don’t look after your knife then it’s your responsibility. If it needs to be fixed (due to the negligence of the knife holder) then we will tell you what is costs.
Hopefully this makes sense.
Please care for your knife with the passion that your knife is made with.
A very good question. Here's a short answer.
What not to do?
Don't put it in the dishwasher or leave it in a sink full of water as this can lead to corrosion. We also recommend against cutting on a glass chopping board as this is terrible for the blade (can lead to chipping).
What to do?
Our knives have a high carbon concentration meaning they are harder at the edge. This means less honing is needed (i.e. sharpening with your rod at home or in the kitchen).
With this type of steel you should have it sharpened by a sharpener (ideally on a whetstone to stop the steel heating). How often varies depending on usage however most people do it every 3-6 months.
To summarise, less honing and more stoning.
If you need help finding a sharpener near you, give us a bell and we will do our best to assist.
Tax for Australian customers:
Australia is easy. We charge 10% GST (which is included in the price).
Tax for overseas customers:
Rest of the world is a little more complicated. To date, we have experienced very few tax issues at customs however we're happy to talk with you if you're unsure (and we can pass on what has happened for knives sent to the same region in the past).