Which Is the Best Knife Sharpening System?

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Updated August 2026 · 7 min read · UK Japanese-steel knife specialists

Keeping your knives sharp is one of the most important things you can do in the kitchen — a dull blade is slower, less precise and more dangerous than a sharp one. But there are five main ways to sharpen a knife, and they are not equal. The right choice depends on your blade, your budget and how much control you want over the edge.

Below we compare whetstones, pull-through and carbide sharpeners, electric machines, honing and diamond steels, and guided systems — then recommend the best system for hard Japanese-steel knives (high-carbon stainless VG10 at around 60–61 HRC and AUS-10 at around 58–61 HRC). Let's investigate.

Why sharpening matters

A dull blade forces you to press harder, and that extra pressure is exactly when a knife slips and cuts you. A sharp edge glides through food with almost no force, so it is both safer and far more pleasant to use. The trade-off is that every sharpening system removes a little steel to create a new edge — so the best system is the one that gives you a keen edge while taking away as little metal as possible. That is the lens we compare them through.

The five knife sharpening systems compared

1. Whetstones (sharpening stones)

A whetstone is a flat abrasive block you draw the blade across at a set angle. It is the system almost every professional and knife enthusiast recommends, because it removes the least metal and lets you control the edge completely — coarse grits (around 400–1000) reset a dull or damaged edge, and fine grits (3000–8000) polish it to a keen, lasting finish. The word whet is simply an old English word meaning "to sharpen"; it has nothing to do with water, although most waterstones do work best with a short soak. The one catch is a learning curve: holding a steady angle takes practice, so many people start on a cheap knife before touching their good ones. Our step-by-step guide on how to sharpen a knife using a whetstone walks you through it.

2. Pull-through and carbide sharpeners

A pull-through sharpener has a slot with a fixed carbide or ceramic V that you drag the blade through. It is cheap, quick and needs no skill — you cannot get the angle wrong because the angle is preset. The problem is that same fixed V: it scrapes away a lot of steel in one aggressive pass and forces every knife to its own angle rather than your blade's. On a soft Western knife that is a reasonable everyday fix. On a hard, thin Japanese edge it is far too coarse and can leave the edge ragged or chipped.

3. Electric sharpeners

An electric knife sharpener spins internal abrasive wheels, usually across two or three grit stages, and sharpens a dull knife in minutes with almost no effort. That convenience is genuine, and for someone with limited hand strength or dexterity it can be the most practical option. But electric machines are the most aggressive system of all — they grind away the most steel and most use a fixed angle you cannot match to your blade, so a premium knife will wear out faster and can lose its fine geometry. We dig into this in our guide on whether electric knife sharpeners are bad.

4. Honing and diamond steels

A "sharpening steel" is really a hone: it does not grind a new edge, it realigns the existing one. Every time you use a knife the fine edge rolls over microscopically, and a few strokes on a steel straightens it back true — which is why a chef steels a blade before carving. A traditional smooth steel only realigns; a diamond-coated steel goes a step further, removing a whisper of metal to refresh the edge as well as align it, which suits hard Japanese steel that a plain steel can struggle to bite. Honing between sharpenings keeps a knife feeling sharp for far longer and reduces how often you need the stones. See whetstone vs honing steel for when to reach for each.

5. Guided sharpening systems

A guided system clamps the knife and holds a stone on an adjustable arm, so you get much of the quality of freehand stone work while the jig keeps the angle consistent for you. Because the angle is adjustable you can match your blade exactly — a real advantage over pull-through and electric sharpeners — and set the roughly 15° per side that hard Japanese edges want. There is still a learning curve and some setup time, but it is gentler than freehand stones and a sensible halfway house for anyone moving on from an electric sharpener.

Knife sharpening systems at a glance

A note on bevels and angles

Two things decide how you sharpen: the bevel (the shape of the edge) and the angle. Most Japanese-steel kitchen knives — including our VG10 and AUS-10 blades — are double-bevel, ground on both sides, and that geometry takes a very keen edge at roughly 15° per side. This is a common point of confusion: double-bevel does not mean a duller knife. A well-made double-bevel Japanese blade is extremely sharp and easier to maintain than a single-bevel (chisel) edge, which is ground on one side only and traditionally found on specialist Japanese knives. Western knives are usually closer to 20° per side. Whichever system you use, match the angle already on your knife and keep it steady through each stroke — our guide to the correct Japanese knife sharpening angle has the detail.

Our sharpening picks for Japanese-steel knives

Want to compare grits and options? Browse the full sharpening stones collection.

Frequently asked questions

What is the best knife sharpening system?

For most kitchens a whetstone is the best system because it removes the least metal and gives the keenest, most controllable edge. For hard Japanese-steel knives a combination waterstone of around 1000 grit to sharpen and 3000 to 8000 to finish is the choice most professionals trust.

Are electric or pull-through sharpeners bad for Japanese knives?

They are convenient but abrasive. Electric and pull-through sharpeners grind away more steel and use fixed angles, which can damage a fine 15-degree-per-side Japanese edge over time. For premium VG10 or AUS-10 blades a whetstone is far kinder and lasts the life of the knife.

What is the difference between honing and sharpening?

Sharpening removes metal to create a new edge, usually on a whetstone. Honing realigns an existing edge with a steel and takes only seconds. Regular honing keeps a knife sharp for longer and reduces how often you need to sharpen it.

What angle should I sharpen a Japanese knife at?

Most Japanese-steel kitchen knives are double-bevel and sharpened at roughly 15 degrees per side. Western knives are usually closer to 20 degrees per side. Match the existing angle of your knife and keep it steady through each stroke.

Do I need to soak a whetstone before use?

Most waterstones benefit from a short soak of around 10 minutes until the bubbles stop, then a splash of water on the surface as you work. Some fine finishing and diamond stones are splash-and-go. Always check the maker's guidance for your stone.

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