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In European tradition, knives are beveled on both sides of the blade; coming to a point in the middle. In Japanese tradition, however, the bevel is only formed on one side (usually the right-hand side). What is the purpose and/or advantage of this?

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When it is sharpened on the Right side, while holding the knife and viewing down on the back of the blade, the Left side of the blade will track vertical through bread, cheese, etc. with the portion that has been trimmed off falling to the Right. I call this "Right Hand Sharpened", and tracks poorly if used by a Left handed person. I have both styles, because my wife is Left handed. It takes a lot of honing to change from Center/Right/Left styles. I hope this isn't to confusing. –  Optionparty Oct 22 '13 at 14:39
    
@Optionparty In many Asian countries left-handed children are forced to use their right hand, so there would be very few Japanese who would want a blade honed on the left. –  Carey Gregory Oct 22 '13 at 23:37
    
@CareyGregory: What is your source for this? To my knowledge, both Shun and Masahiro make left-handed knives; and have done so for a long time. –  razumny Oct 23 '13 at 6:15
    
It's no secret that left-handedness is eschewed in many Asian countries. Google Japan + left handed. I'm sure companies make left-handed knives, but I would bet they're primarily for the export market. –  Carey Gregory Oct 23 '13 at 14:47
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This has possible been answered in another forum. outdoors.stackexchange.com/questions/1581/… –  cspirou Oct 24 '13 at 19:56

2 Answers 2

up vote 3 down vote accepted

For vegetable knives, the main advantage of the front-side single bevel is that it's easier to make super-thin cuts. For example, a test of knife skill involves paring daikon radish to remove the peel, then continuing to cut to make a long continuous paper-thin strip, longer than you would be able to make if you just sliced it. See, for example, http://www.youtube.com/watch?v=oLZUJGyuhQM

People who have mastered this skill can also make remarkably fast matchstick cuts after making the long piece, and the lack of back bevel may reduce the amount of food that sticks to the knife. Some of these single-bevel knives that features a slightly concave backside (urasuki), which may also reduce the amount of adherence of food to the knife.

For crab knives, the honing is on the opposite side to the hand (the back of the knife), which may reduce the amount of shell fragments that could embed themselves into the meat, and probably allows the meat to cut more cleanly.

In practice, though, most Japanese households use dual-beveled knives. Single-bevel is more common in professional kitchens, especially in the Kansai area where fancy cutting techniques are used in presentation to a greater extent than in Tokyo or north Japan.

Although I have a nice nakiri knife and a cheap santoku, both are dual-beveled.

Knives meant for cutting regular fish or meat are usually, but not always, dual-beveled, the exception again mostly being for professionals. (I think yanagiba and sushi knives are usually single-bevel, but are again mostly used in professional kitchens and almost never at home). I thought sobakiri and udonkiri were typically single-bevel to help push the cut noodles away, but more recently I am less sure that the single-bevel is as common as I had previously thought for soba or udon knives.

The Japanese wikipedia entry for usuba knives suggests that the single-bevel edge is more durable, so, if true, that would be an advantage in high volume restaurant use. In my experience a thin, well sharpened Japanese blade may chip more easily than a thicker blade, so that resonates with me, even though I'm not 100% sure the notion that a single bevel is more durable is more than received wisdom.

With practice, I think you can get slightly more precision cuts with a single bevel than with dual-bevel knives, however, I don't think they are as easy to use for cooks with average knife skills.

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Now that is exactly what I was looking for. Thanks! –  razumny Nov 1 '13 at 6:54

Japanese vegetable cleavers are honed on one side only so the veggies don't stick to the knife and fall away as they cut then for stir fry, for example.

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