The Seki-City, Gifu-Prefecture is a small town
located in the middle of Japan, and is famous worldwide for its production of
fine knives like Solingen in Germany. The history
(about 780 years) of Seki cutlery industry dates back to the 13th century, when
master sword smith, Motoshige moved from Kyushu district to Seki and began
making his swords here. He chose Seki for its rich natural as well as material
conditions.
Seki offered, at the top of the list, good quality iron sand, charcoal
and water.
During the Muromachi Era (1338-1573), which
began just a century later, there were over 300 sword smiths working in Seki.
Kanemoto Magoroku and Saburo Shizu were two of the most famous. The superior
quality of Seki swords and the name of Seki were quickly recognized throughout
Japan and its solid reputation as a sword-making center was established.
The techniques and skills and the ancient
attitudes of traditional Japanese sword making has been passed down across the
centuries and are still alive in today's modern cutlery industry. And Seki City
remains a vibrant center of Japanese cutlery manufacture.
There
are a number of different types of Japanese
kitchen knives. The most commonly used types in the Japanese Kitchen are
the deba bocho (fish filleting), the santoku hocho (all-purpose utility knife), the nakiri bocho and usuba hocho (Japanese vegetable
knives), and the tako hiki and yanagi ba (sashimi slicers).
Types of kitchen knives
There
are two classes of traditional Japanese knife forging methods: honyaki and kasumi.
The class is based on the method and material used in forging the knife. Honyaki
are true-forged knives, made
from one material.
This
is generally a top grade with knife specific steel (blue and white steel are
most common). Kasumi are made from two materials: high-carbon steel
"hagane" (blue or white steel in good kasumi knives) and soft iron
"jigane" forged together. This style of knife offers a similar cutting
edge to a honyaki blade in high-grade knives. It offers the benefit of being
"more forgiving" and generally easier to maintain than the honyaki
style, at the expense of stiffness. Some see this as an advantage.
San
Mai generally refers to knives with the hard steel hagane forming the blade's
edge and the iron/stainless forming a jacket on both sides. In stainless
versions, this offers a practical and visible advantage of a superb cutting
edge of modern Japanese knife steel with a corrosion resistant exterior. In
professional Japanese kitchens, the edge is kept free of corrosion and knives
are generally sharpened on a daily basis. Corrosion can be avoided by keeping
the exposed portion of the non-stainless portion of the blade clean and dry
after each use.
Honyaki
and kasumi knives are both forged out of steel. Honyaki knives are stiffer and
are said to have better kirenaga
(duration of sharpness) and hardness, however they are more difficult to use
and maintain. Additionally, there are high-grade quality kasumi knives called
hongasumi and layered-steel kasumi called Suminagashi or Damascus that
have longer kirenaga.
Originally,
all Japanese kitchen knives were made from the same carbon steel as the
traditional Japanese swords named Nihonto but the forging method is different. Nihonto
are forged out of one type of steel that is laminated and then differentially heat-treated.
Currently san mai knives have a
similar quality, containing an inner core of hard and brittle carbon steel,
with a thick layer of soft and more ductile steel sandwiched around the core so
that the hard steel is exposed only at the cutting edge. Nowadays stainless
steel is often used for Japanese kitchen knives, and san mai or Suminagashi
laminated blade construction is used in more expensive blades to add corrosion
resistance while maintaining strength and durability.
Production
Much
of the high-quality Japanese cutlery originates from Sakai, the capital of
sword manufacturing
since the 14th century. After the Meiji Restoration, the
carrying of swords by the samurai class was banned as part of an attempt to modernize
Japan. Though demand for military swords remained and some sword smiths still
produced traditional samurai swords as art, the majority of sword smiths
refocused their skill to cutlery production.
The
production of steel knives in Sakai started in the 16th century, when the
Portuguese introduced tobacco to Japan, and Sakai craftsmen started to make
knives for cutting tobacco. The Sakai knives industry received a major boost from
the Tokugawa Shogunate (1603–1868), which granted Sakai a special seal of
approval and enhanced its reputation for quality (and according to some
references a monopoly).
During
the Edo period (1603–1867) or more precisely the Genroku era (1688–1704)) the
deba bocho were manufactured, soon followed by a wide range of other styles.
Making kitchen knives and related products is still a major industry in Sakai,
using a combination of modern machinery and traditional hand tools to make
stain-resistant carbon steel blades.
Seki,
Gifu is today considered the home of modern Japanese kitchen cutlery, where
state-of-the-art manufacturing and technology has updated ancient forging
skills to produce a world-class series of stainless and laminated steel kitchen
knives famed throughout the world. The major cutlery making companies are based
in Seki, and they produce the highest quality kitchen knives in the traditional
Japanese style and the western style, like the gyuto and the santoku Knives and
swords are so much a part of the city that it is home of the Seki Cutlery
Association, the Seki Sword smith Museum, the Seki Outdoor Knife Show, the
October Cutlery Festival, and the Cutlery Hall where tourists can purchase
knives.
Another
famous center for traditional blacksmiths and knife smiths is Miki City. Miki
is well known to all of Japan for its knife making traditions, and its knives
and tools recall the pride of Japanese steelmaking. Most Miki manufacturers are
small family businesses where craftsmanship is more important than volume and
typically produce fewer than a dozen knives a day.
Design and philosophy
Unlike
western knives, Japanese knives are often single ground, i.e., sharpened so
that only one side holds the cutting edge. Some Japanese knives are angled from
both sides, and others are angled only from one side, with the other side of
the blade being flat. It was originally believed that a blade angled only on
one side cuts better and makes cleaner cuts, though requiring more skill in its
use than a blade with a double-beveled edge. Usually, the right hand side of
the blade is angled, as most people use the knife with their right hand, with
ratios ranging from 70–30 for the average chef's knife, to 90–10 for
professional sushi chef knives; left handed models are rare and must be
specially ordered and custom made.
Since
the end of World War II, western-style double-beveled edged knives have become
much more popular in Japan, the best example being that of the santoku, an
adaptation of the gyuto, gyūtō,
gyuto, gyutou), the French
chef’s knife and the Sujihiki which is roughly analogous to a western slicing
or carving knife. While these knives are usually sharpened symmetrically on
both sides, their blades are still given Japanese-style acute-angle cutting
edges of 8-10 degrees per side with a very hard temper to increase cutting
ability.
Professional Japanese cooks
usually own their personal set of knives, which are not used by other cooks.
Some cooks even own two sets of knives, which they alternate every other day. After
sharpening a carbon-steel knife in the evening after use, the user normally
lets the knife "rest" for a day to restore its patina and remove any
metallic odor or taste that might otherwise be passed on to the food.
Japanese knives feature subtle
variations on the chisel grind: the backside of the blade is often concave, to
reduce drag and adhesion so the food separates more cleanly; this feature is
known as urasuki. The kanisaki deba, used for cutting crab
and other shellfish, has the grind on the opposite side (left side angled for right-handed use), so that
the meat is not cut when chopping the shell.