Japan — yanagi-ba developed in Osaka professional sashimi culture; takohiki in Edo/Tokyo; Sakai City (Osaka) as historical production center
The single-bevel long knives of Japanese professional fish cutting represent specialized tool design for specific applications. Yanagi-ba (柳刃, willow blade): the standard professional sashimi knife — long (240-330mm), single-bevel, pulled in a single drawing stroke through fish flesh. The name comes from the willow-leaf shape profile. Takohiki (蛸引き, octopus puller): the Kanto/Tokyo sashimi knife — same length but with a square, blunt tip (suitable for cutting through octopus without the pointed tip catching). Funayuki (船行き, boat-going): shorter, double-bevel sashimi knife for working on boats or for less formal cutting. The single-bevel design creates a completely clean cut face — one side is perfectly flat, creating a mirror-clean slice.
Technique creates flavor — the mirror-clean cut face of a single-bevel yanagi preserves fish cell structure, improving texture and reducing oxidation
{"Single bevel advantage: food releases from flat side of knife — creates clean, mirror cut face","Yanagi vs takohiki: yanagi has pointed tip (Osaka/Kansai); takohiki has square tip (Tokyo/Kanto)","Pulling cut only: draw the full blade length in single stroke — never saw or push","Kasumi finish: traditional yanagi has kasumi (misty) finish — 1000-grit left side, polished right","Length selection: 270mm for home use; 300mm+ for professional — longer allows full single-stroke cut","Handle material: magnolia wood (ho no ki) is standard; ebony for premium — absorbs moisture without expanding"}
{"Honyaki vs kasumi construction: honyaki = full hard steel throughout (most expensive, most difficult to sharpen); kasumi = hard steel edge laminated to soft iron","Water test for flatness: wet the flat side, press on stone — should show full contact, no light gap","Yanagi length for tuna: 330mm allows single-cut slice from large maguro loins without interruption","Regional knife culture: Sakai (Osaka) and Kyoto are primary yanagi producers; Tokyo has distinct takohiki tradition","Cutting direction indicator: the flat side indicates which side of the fish the clean face appears on"}
{"Sawing motion with yanagi — defeats the single-pull design; creates ragged cut faces","Sharpening flat side on coarse stone — removes the hollow grind, destroys the geometry","Using yanagi for cutting board impact tasks — the thin single bevel chips on hard impact"}
Japanese Kitchen Knives — Funayuki documentation; Sakai Knife Producers; Aritsugu Kyoto reference