Single-smith bladesmith · Takefu, Echizen
Kōtō
One smith. One edge at a time. Steel folded upon itself, quenched in water, and drawn down to a single honed line — with a hamon that never sits still.
What your hand never sees
The steel
A billet is heated, folded, and hammered flat — then heated and folded again. Each fold doubles the layers and halves the impurity. What begins as two becomes thousands, and the grain of that folding is the pattern you can still read on the finished spine.
Each fold is a decision that cannot be undone. Fold too cold and the weld fails; too hot and the carbon burns away. The smith reads the colour of the steel, not a gauge.
- Quench Water, at the edge only — a clay coat holds the spine soft
- Line The clay's border becomes the hamon, the temper line
- Finish Hand-stoned through eight grits until the grain shows
Four shapes, one hand
The range
A small catalogue, made to order. Each blade is a compromise resolved — weight against agility, hardness against forgiveness. The specification plate tells you exactly what you are holding.
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Gyuto 240
The one knife, if there is only one. Long enough to rock and to slice, thin enough behind the edge to fall through an onion of its own weight.
- Steel
- Aogami #2 · san-mai
- Hardness
- 63 HRC
- Bevel
- 70 / 30 asymmetric
- Handle
- Octagonal ho wood · buffalo horn
Made to order · from ¥86,000
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Santoku 165
Three virtues — meat, fish, vegetable. A flatter belly for push-cuts and a tall face for scooping. The knife most hands already know.
- Steel
- Shirogami #2 · white paper
- Hardness
- 62 HRC
- Bevel
- 50 / 50 even
- Handle
- Chestnut · ebony ferrule
Made to order · from ¥64,000
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Petty 135
The small, precise one — for the work your fingers do close to the board. Peeling, segmenting, the quiet detailing that a big knife bullies.
- Steel
- SG2 · powdered stainless
- Hardness
- 64 HRC
- Bevel
- 60 / 40 asymmetric
- Handle
- Rosewood · blackened collar
Made to order · from ¥48,000
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Nakiri 165
A flat, square wall of steel for vegetables — straight down, edge to board, no rocking. Cabbage falls in sheets; a daikon in coins.
- Steel
- Blue Super · san-mai core
- Hardness
- 64 HRC
- Bevel
- 50 / 50 even
- Handle
- Claro walnut · horn ferrule
Made to order · from ¥58,000
One smith, one bench
The maker
“A blade is not sharp because I made it sharp. It is sharp because I removed everything that was not the edge.”
Ren Asano keeps a single forge at the edge of Takefu, where knife steel has been folded for six centuries. He trained eleven years under his teacher before he was permitted to sign his own work, and he still makes every blade alone — from raw billet to the last pass on the finest stone.
He makes perhaps ninety knives a year. There is a waiting list. He is unhurried about it, and asks that you are too.
— Ren Asano, smith
Keep the edge alive
Care & sharpening
Carbon steel asks for a little attention and returns a great deal of it. Wipe it dry, feed it a whetstone now and then, and it will outlast you — patina and all.
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01
Soak the stone
Rest a whetstone in water until the bubbles stop rising — ten minutes for a coarse stone, less for fine. A dry stone tears the edge instead of forming it.
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02
Set the angle
Lay the bevel flat, then lift the spine about the width of two coins — roughly fifteen degrees. Hold that angle as if it were the whole point. It is.
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03
Raise a burr, then chase it
Work one side until you feel a faint wire of metal fold over the other edge. Flip, and raise it back. That burr means the two bevels have finally met.
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04
Climb the grits
Move up through the stones — 1000, then 3000, then 8000. Each finer stone erases the scratches of the last until the edge stops catching the light at all.
Never the dishwasher, never left wet, never a glass board. Carbon rusts if you let it, and a hard surface rolls the edge you just spent an evening raising.
Begin a blade
Commission
Every knife is made to order, one at a time, in the order it was asked for. Tell the smith what your hand does most, and he will tell you what to hold.