Oroshihocho (literally: wholesaleknife) and hancho hocho (literally: half tool knife) are extremely long highly specialized knives used in Japan to fillet tuna and other large fish.
The oroshihocho is the longer blade with a blade length of 150 cm in addition to a 30 cm handle, and can fillet a tuna in a single cut, although usually two to three people are needed to handle the knife and the tuna.
The hancho hocho is the shorter blade with a length of around 100 cm in addition to the blade.
The long knife that you can see in this photo is called Oroshihocho, they are extremely long and highly specialized knives used in Japan to fillet tuna and other large fish.
The oroshihocho is the longer blade with a blade length of 150 cm (60 inches) in addition to a 30 cm (12 inch) handle, and can fillet a tuna in a single cut, although usually two to three people are needed to handle the knife and the tuna.
The flexible blade is curved to the shape of the spine to minimize the amount of meat remaining on the tunachassis.
Das "Hocho" genannte traditionelle japanische Messer wird in der Regel aus zwei oder drei Schichten Stahl bzw.
Sie schärfen japanische Hocho am besten auf japanischen Wassersteinen.
Dieser vermeintliche Nachteil wird aber dadurch mehr als ausgeglichen, daß diese Weichstahlschichten es ermöglichen, die dünne Carbonstahlschneidschicht ohne Gefahr der Rißbildung bis zu 61 HRC aufzuhärten.