Seki Kyuba KATA Vegetable Knife Nakiri 18cm
An 18cm Nakiri — the flat-edged Japanese vegetable knife (‘leaf cutter’). Its straight profile and squared tip push-cut cleanly through everything from onions to leafy greens in one stroke, and the tall blade scoops chopped veg straight off the board. VG10 core, 3-layer, 60–62 HRC.
Lifetime warranty
Every knife we have ever made, covered for life.
Free UK delivery
Included on every order over £90.
100-day returns
Use it for three months. Send it back if it isn’t right.
Hand-finished box
Hanko-stamped certificate, 5 yen coin tucked alongside.
Why this knife
The blade, and the thinking behind it.
The Nakiri
The term “Nakiri” roughly translates to “leaf cutter”, which describes its job precisely. The straight edge and squared-off tip are made for efficient push-cutting through vegetables, while the 18cm blade gives ample knuckle clearance for comfortable, repetitive chopping without fatigue. Its tall profile also lets you scoop chopped vegetables straight off the board, streamlining prep. A natural choice if you prioritise vegetable work or want a specialised blade in your collection.
The Blade
KATA blades are handcrafted in Seki, Gifu around a VG10 high-carbon stainless core with a 3-layer construction — a premium steel prized for edge retention and corrosion resistance. At 60–62 HRC the edge holds through regular use with little upkeep, and the hammered finish creates tiny air pockets that keep vegetables from sticking to the blade.
The blade
Specifications.
| Weight | 0.7 kg |
|---|---|
| Dimensions | 45 × 10 × 6 cm |
| Knife Type | |
| Blade Length | |
| Steel Type | |
| HRC | |
| Made in | Japan |
| Maker | Oishya, Seki Kyuba |
| Knife Handle Material | |
| Knife Bevel | Double |
| Hand Feature | Ambidextrous |
| Handle Waterproof | Yes |
The hands that make it
Seki. Seven hundred years of blade-making.
Seki, in Gifu, has been forging blades since the fourteenth century — first samurai swords, then kitchen knives. The workshop we work with forges five of our six lines.
The handle is finished in Małopolska, Poland, by craftsmen who shape every handle by hand: a stabilised maple burl body and a bog oak ferrule — the kakumaki. The blade and handle meet at a single hand-fitted copper ring, set with a soft tap of a wooden mallet, in an octagonal profile.
Care, briefly
Three habits, and it outlasts you.
01.
Hand wash, dry immediately.
Never the dishwasher. Sixty seconds at the sink, then a soft towel. Water on hard Japanese steel is the only thing that rusts it.
02.
Wood boards only.
Glass, stone and marble are harder than the steel and dull the edge in a week. End-grain hardwood is the right choice — hinoki cypress if you can find it.
03.
Sharpen on a stone.
Never a honing rod — the steel is too hard, it chips the edge. A 1000/6000 whetstone every three or four months keeps it keen.
What you receive
In the box.
- The knife, sharpened, oiled, wrapped in cloth.
- A hand-finished box for the knife.
- A Certificate of Authenticity, hand-stamped with the maker’s hanko, naming the smith and certifying the blade.
- A 5 yen coin tucked alongside. “Go en” — the Japanese for five yen — is the homophone for luck, connection and bond. Returning the coin to the giver turns the gift-knife into a symbolic purchase, neutralising the old superstition that a knife as a gift cuts the bond between giver and receiver.
- A care card with the sixty-second wash routine and a link to Knife School.
- Your lifetime warranty, registered to you automatically when the order ships.
Frequently asked.
Is it dishwasher safe?
How often will I need to sharpen it?
Can I use it to cut meat?
How long does shipping take?
What if it isn't right for my kitchen?
From the people who cook with it
Reviews.
Impressive knife. The single-bevel grind takes some getting used to if you’re coming from Western knives, but once you adapt, the precision is unmatched. Great steel, beautiful finish.
A lovely set with excellent knives. The quality is apparent as soon as you pick them up. Each knife has great edge retention and the handles are comfortable. Delivery took a little longer than expected but the wait was worth it.
A lovely set with excellent knives. The quality is apparent as soon as you pick them up. Each knife has great edge retention and the handles are comfortable. Delivery took a little longer than expected but the wait was worth it.
Beautiful knife with an aggressive edge. The bunka shape was new to me but I’m a convert now. Works brilliantly for my style of cooking. The handle could be slightly longer for my preference, but overall a superb knife.
Beautiful knife with an aggressive edge. The bunka shape was new to me but I’m a convert now. Works brilliantly for my style of cooking. The handle could be slightly longer for my preference, but overall a superb knife.
Good quality sharpening stone that does what it promises. I use it to maintain my Japanese knives every few weeks. The grit is consistent and it doesn’t dish out too quickly. Solid purchase for the price.
This petty knife fills the gap perfectly between my gyuto and a paring knife. Great for fruits, small vegetables, and garnish work. The steel quality is noticeably better than anything in this price range.
This petty knife fills the gap perfectly between my gyuto and a paring knife. Great for fruits, small vegetables, and garnish work. The steel quality is noticeably better than anything in this price range.
This petty knife fills the gap perfectly between my gyuto and a paring knife. Great for fruits, small vegetables, and garnish work. The steel quality is noticeably better than anything in this price range.
This petty knife fills the gap perfectly between my gyuto and a paring knife. Great for fruits, small vegetables, and garnish work. The steel quality is noticeably better than anything in this price range.
Not sure this is the one?
Take two minutes.
Six questions about the way you actually cook. We’ll point you to the knife that fits.