Seki Kyuba RYU Knife Set: Santoku, Nakiri, Petty
The RYU compact trio: an 18cm Santoku, a 17.5cm Nakiri and a 15cm Petty — all VG10 core in 33-layer stainless Damascus, hand-forged in Seki. Between them they cover everyday slicing, vegetable prep and fine detail work, in the shorter, lighter blades many cooks prefer. 62 HRC, with a certificate and 5-yen coin per knife.
Lifetime warranty
All three blades, covered for life.
Free UK delivery
Included on every set.
100-day returns
Cook with the whole set. Send it back if it isn’t right.
Hand-finished box
Hanko-stamped certificate, 5 yen coin tucked alongside.
What's in the set
Three knives, chosen to cover a kitchen.
The Mighty Three: Santoku, Nakiri and Petty
A three-piece set, handcrafted in Seki: an 18cm Santoku, a 17.5cm Nakiri and a 15cm Petty. Together they cover the everyday — the Santoku slices, dices and chops; the Nakiri makes quick, clean push-cuts through vegetables; the Petty handles trimming, peeling and fine slicing. It’s the set for cooks who prefer shorter, lighter blades without giving up performance.
The Blade
Each knife shares the RYU build: a VG10 steel core in 33 layers of stainless Damascus, hand-forged in Seki, Gifu. At 62 HRC the VG10 core holds a razor edge, and the layered cladding adds durability, stain resistance and a flowing, water-like grain.
The full Damascus pattern is finished with a subtle hammered texture that helps food release as you cut. Available in Mediterranean Blue, Olive Green or Natural Brown.
The blades
Shared specifications.
| Weight | 1.7 kg |
|---|---|
| Dimensions | 45 × 10 × 6 cm |
| Knife Type | |
| Blade Length | |
| Steel Type | |
| HRC | |
| Knife Bevel | Double |
| Hand Feature | Ambidextrous |
| Handle Waterproof | Yes |
| Made in | Japan |
| Maker | Oishya, Seki Kyuba |
| Knife Handle Material |
The hands that make it
Three knives. One workshop. One standard.
Every blade in the RYU set is forged in Seki, Gifu, by the workshop we have worked with for years. Same VG10 steel, same 33-layer Damascus, same hand-fitted bolster. The set is consistent because the maker is consistent.
A VG10 core in 33 Damascus layers, hardened to HRC 62.
The handles are finished in Małopolska, Poland, by the same craftsmen who finish every Oishya handle: a stabilised maple burl body, a bog oak ferrule (the kakumaki), a hand-fitted copper ring, an octagonal profile. Assembled by hand, one knife at a time.
Care, briefly
Three knives. Same three habits.
01.
Hand wash all three.
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 all three keen.
What you receive
In the box.
- The three knives in your set, each sharpened, oiled and wrapped in cloth.
- One hand-finished set box holding all three.
- A Certificate of Authenticity, hand-stamped with the maker’s hanko, naming the smith and certifying each blade.
- A 5 yen coin tucked alongside the knives. “Go en” — the Japanese for five yen — is the homophone for luck, connection and bond. Returning the coin to the giver turns the gift 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 on all three blades when the order ships.
Frequently asked.
Can I swap a knife in the set?
Are all three knives under the lifetime warranty?
How do I sharpen them?
Is gift wrapping included?
How long does shipping take?
What if the set isn't right?
From the people who cook with it
Reviews.
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.
These three knives cover everything I need in the kitchen. The gyuto for meat and large veg, the nakiri for fine vegetable work, and the petty for detail tasks. All three are razor sharp with beautiful balance. Worth every penny.
Bought this set as a wedding gift for my daughter and she was over the moon. The presentation box is gorgeous and each knife is a work of art. They’re not just beautiful — they perform exceptionally well. Best kitchen gift I’ve ever given.
