An unagisakihōchō (鰻裂き包丁, lit: eel filleting knife) is a knife specialized for filleting eel. [1] The sharp tip of the knife is pushed into the eel near the head, and then slid along the body of the eel to open up the entire length of the fish. [2] Besides the standard version as shown in the picture, there are many other local styles that differ significantly for different cities in Japan like Nagoya, Osaka, and Kyoto. [2]
A knife is a tool or weapon with a cutting edge or blade, usually attached to a handle or hilt. One of the earliest tools used by humanity, knives appeared at least 2.5 million years ago, as evidenced by the Oldowan tools. Originally made of wood, bone, and stone, over the centuries, in step with improvements in both metallurgy and manufacturing, knife blades have been made from copper, bronze, iron, steel, ceramic, and titanium. Most modern knives have either fixed or folding blades; blade patterns and styles vary by maker and country of origin.

Debabōchō are Japanese style kitchen knives primarily used to cut fish, though also used when cutting meat. They come in different sizes, sometimes up to 30 cm (12 inches) in length. The debabōchō first appeared during the Edo period in Sakai. It is designed to behead and fillet fish. Its thickness, and often a more obtuse angle on the back of the heel allow it to cut off the heads of fish without damage. The rest of the blade is then used to ride against the fish bones, separating the fillet.
A Japanese kitchen knife is a type of kitchen knife used for food preparation. These knives come in many different varieties and are often made using traditional Japanese blacksmithing techniques. They can be made from stainless steel, or hagane, which is the same kind of steel used to make Japanese swords. Most knives are referred to as hōchō or the variation -bōchō in compound words but can have other names including -kiri. There are four general categories used to distinguish the Japanese knife designs: handle, blade grind, steel, and construction.
Nakiribōchō and usubabōchō are Japanese-style vegetable knives. They differ from the debabōchō in their shape, as they have a straight blade edge suitable for cutting all the way to the cutting board without the need for a horizontal pull or push. These knives are also much thinner. While the debabōchō is a heavy blade for easy cutting through thin bones, the blade is not suitable for chopping vegetables, as the thicker blade can break the vegetable slice. The nakiribōchō and the usubabōchō have much thinner blades. This does not help with cutting small bones in fish or meat, but is useful for cutting vegetables.
Usubabōchō is the traditional vegetable knife for the professional Japanese chef. Like other Japanese professional knives, usuba are chisel ground, and have a bevel on the front side, and have a hollow ground urasuki on the back side. Usuba characteristically have a flat edge, with little or no curve, and are tall, to allow knuckle clearance when chopping on a cutting board. Usuba literally means "thin blade" indicating its relative thinness compared to other knives, required for cutting through firm vegetables without cracking them. Due to its height and straight edge, usuba are also used for specialized cuts such as katsuramuki, shaving a vegetable cylinder into a thin sheet.
A magurobōchō, or magurokiribōchō, is an extremely long, highly specialized Japanese knife that is commonly used to fillet tuna, as well as many other types of large ocean fish.
Sashimi bōchō, literally "sashimi knife" is a type of long, thin knife used in Japanese cuisine to prepare sashimi. Types of sashimi bōchō include tako hiki, yanagi ba, and fugu hiki.
A kitchen knife is any knife that is intended to be used in food preparation. While much of this work can be accomplished with a few general-purpose knives – notably a large chef's knife, a tough cleaver, a small paring knife and some sort of serrated blade – there are also many specialized knives that are designed for specific tasks. Kitchen knives can be made from several different materials.
In cooking, a chef's knife, also known as a cook's knife, is a cutting tool used in food preparation. The chef's knife was originally designed primarily to slice and disjoint large cuts of beef. Today it is the primary general utility knife for most Western cooks.
The santokubōchō(Japanese: 三徳包丁, 'three virtues' or 'three uses') or bunkabōchō(文化包丁) is a general-purpose kitchen knife originating in Japan. Its blade is typically between 13 and 20 cm long, and has a flat edge. The santoku has and a sheepsfoot blade that curves down an angle approaching 60 degrees at the point. The bunkabōchō, however, has a k-tip. The term santoku may refer to the wide variety of ingredients that the knife can handle: fish, meat, and vegetables, or to the tasks it can perform: chopping, dicing, and slicing, with either interpretation indicating a multi-use, general-purpose kitchen knife. The term bunka, refers to how it is used for the cultural food of Japan. The blade and handle of the santoku are designed to work in harmony by matching the blade's width and weight to the weight of the tang and the handle.
WÜSTHOF is a knife-maker based in Solingen, Germany. Family owned for seven generations, the company's main products are mid-priced to high-end kitchen knives for domestic and professional use. WÜSTHOF is one of the leading manufacturers of chef's knives.
Sharpening is the process of creating or refining the edge joining two non-coplanar faces into a converging apex, thereby creating an edge of appropriate shape on a tool or implement designed for cutting. Sharpening is done by removing material on an implement with an abrasive substance harder than the material of the implement, followed sometimes by processes to polish/hone the sharp surface to increase smoothness.
Unadon is a dish originating in Japan. It consists of a donburi type large bowl filled with steamed white rice, and topped with fillets of eel (unagi) grilled in a style known as kabayaki, similar to teriyaki. The fillets are glazed with a sweetened soy-based sauce, called tare and caramelized, preferably over charcoal fire. The fillets are not flayed, and the grayish skin side is placed faced down. Sufficient tare sauce is poured over so that some of it seeps through the rice underneath. By convention, pulverized dried berries of sanshō are sprinkled on top as seasoning. It is also very popular outside of Japan, particularly in Taiwan and the United States.
GLOBAL is a Japanese brand of kitchen knives and accessory tools owned and manufactured by the Yoshikin factory of Japan. The Yoshikin Factory is owned by the Watanabe family and located in Tsubame, Japan.
Knife sharpening is the process of making a knife or similar tool sharp by grinding against a hard, rough surface, typically a stone, or a flexible surface with hard particles, such as sandpaper. Additionally, a leather razor strop, or strop, is often used to straighten and polish an edge.
Kershaw Knives designs, sources and manufactures a wide range of knives, including pocketknives, sporting knives, and kitchen cutlery. Kershaw is a brand of Kai USA Ltd., a member of the KAI Group, headquartered in Tualatin, Oregon, United States.
A steak knife is a sharp table knife designed to efficiently and effectively cut steak. This type of knife comes in a variety of styles and sizes; however, the design often used in a steakhouse typically features a partially serrated blade and wood handle.
A fillet knife is a kitchen knife used for filleting. It gives good control and aids in filleting. It is a very flexible member of the boning knife family that is used to filet and prepare fish. Fillet knife blades are typically 15 to 28 cm long. This allows them to move easily along the backbone and under the skin of meat.
Hōchōdō is a traditional Japanese culinary art form of filleting a fish or fowl without touching it with one's hands.
unagisaki hocho.