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santoku
The Santoku bōchō (Japanese: 三徳包丁; "three virtues" or "three uses") or Bunka bōchō (文化包丁) is a general-purpose kitchen knife originating in Japan. Its blade is typically between long, and has a flat edge and a sheepsfoot blade that curves in an angle approaching 60 degrees at the point. The top of the Santoku's handle is in line with the top of the blade. The word refers to the three cutting tasks which the knife performs well: slicing, dicing, and mincing. The Santoku's blade and handle are designed to work in harmony by matching the blade's width/weight to the weight of blade tang and handle, and the original Japanese Santoku is a well-balanced knife.〔http://housewares.about.com/od/cutleryknives/f/santokuknives.htm〕
==Design==
Santoku blade geometry incorporates the sheep's foot tip. A sheep's foot design essentially draws the spine ("backstrap") down to the front, with very little clearance above the horizontal cutting plane when the blade is resting naturally from heel to forward cutting edge. Providing a more linear cutting edge, the Santoku has limited "rocking" travel (in comparison to a German/Western-style chef's knife). The Santoku may be used in a rocking motion; however, very little cutting edge makes contact with the surface due to the extreme radius of the tip and very little "tip travel" occurs due to the short cantilever span from contact landing to tip. An example of this limitation can be demonstrated in dicing an onion -- a Western knife generally slices downward and then rocks the tip forward to complete a cut; the Santoku relies more on a single downward cut and even landing from heel to tip, thus using less of a rocking motion than Western style cutlery.
The Santoku design is shorter, lighter, thinner, and more hardened (to compensate for thinness) than a traditional Western chef's knife. Standard Santoku blade length is between six and seven inches, in comparison to the typical eight inch home cook's knife. Most classic kitchen knives maintain a blade angle between 40 and 45 degrees (a bi-lateral 20 to 22.5 degree shoulder, from cutting edge); Japanese knives typically incorporate a chisel-tip (sharpened on one side), and maintain a more extreme angle (10 to 15 degree shoulder). A classic Santoku will incorporate the Western-style, bilateral cutting edge, but maintain a more extreme 12 to 15 degree shoulder, akin to Japanese cutlery. It is critical to increase the hardness of Santoku steel so edge retention is maintained and "rolling" of the thin cutting edge is mitigated. However, harder, thinner steel is more likely to chip, when pushing against a bone for example. German knives use slightly "softer" steel, but have more material behind their cutting edge. For the average user, a German-style knife is easier to sharpen, but a Santoku knife, if used as designed, will hold its edge longer. With few exceptions, Santoku knives typically have no bolster, sometimes incorporate "scalloped" sides, called kullens, also known as a Granton edge, and maintain a more uniform thickness from spine to blade.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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