How to Sharpen a Ginsu Knife

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Things You'll Need

  • Bench-style sharpening stone

  • Honing oil

  • Rag


Never use a hand stone when sharpening a Ginsu knife. You are much more likely to inadvertently cut your own hand.

Use caution when wiping oil away from the knife blade because you can cut yourself if you are not careful.

Sharpening a Ginsu knife needs to be done carefully.

Ginsu knives are well-known for their longevity and their durability. They first gained popularity in the late 1970s with a series of commercials showing the knife cutting through tin cans, nails and radiator hoses. The knife then cut through a tomato and created thin slices that many other knives could not replicate. The Ginsu knives have a lifetime guarantee and are not supposed to need sharpening under most circumstances, but they can be sharpened when necessary.


Step 1

Lubricate the surface of your sharpening stone with either water or honing oil, depending on the type of stone you are using.

Step 2

Angle your Ginsu blade against the surface of the stone so that the edge of the blade is at its bevel angle to the stone. The bevel angle is the recommended angle that type of blade requires to be sharpened optimally. Your knife set should have the bevel angles listed or you can link to the chart in the Resources section.

Step 3

Run the blade across the stone from the hilt (the part of the Ginsu blade closest to the handle) to the tip. Slide the blade across the stone in this fashion 10 to 20 times.


Step 4

Flip the blade over and repeat the process on the other side of the blade.

Step 5

Repeat as necessary until you achieve the desired sharpness.

Step 6

Wipe away any remaining oil from the stone and from the knife blade with a rag.


references & resources

Michael Davidson

Michael Davidson started writing screenplays in 2003 and has had a screenplay professionally produced. He has also studied martial arts since 1990 and has worked as a licensed security specialist. Davidson has written articles for various websites. He is a graduate of Michigan State University and holds a Bachelor of Arts in advertising.