Kurosaki Petty Kuro-uchi 120mm (4.7")
Yu Kurosaki's Petty Kuro-uchi features incredible sharpness and unique design. Petty with a 120mm (4.7") blade is essentially a smaller version of Gyuto knife (Chef's knife). Petty knives are intended for all those smaller tasks where larger knives are deemed unwieldy, both on and off the cutting board. A must-have knife in every kitchen, it can be used for peeling, mincing, paring and decorating food.
The core of the knife is Aogami Super steel (one of the most regarded high-carbon steels), clad in two layers of softer layers of stainless steel (called san-mai clad). This is a great combination of two different types of steel - the outer layers will protect the blade from developing rust, and at the same time, we have top-notch steel for the cutting edge. Advantages of Aogami Super steel are a very fine, gentle sharpness, it is easy to sharpen, and remains sharp for a long time. The lower part of the blade where Aogami Super steel is exposed will develop some patina after time, so we recommend oiling the blade regularly in order to prevent the development of rust.
The Kuro-uchi finish, the untreated upper part of the blade has an already-developed dark patina which protects the blade and gives it a traditional Japanese look. Hammer dents on the blade add a wonderful finish and at the same time prevent food from sticking to the blade.
The handle is made from beautiful dark rosewood and shaped octagonally, so it fits the hands of both left- and right-handed users. A great knife to own, use and to marvel at the amazing skills of the young master blacksmith.
About Yu Kurosaki:
Yu Kurosaki is a young, talented master blacksmith who lives in Takefu Knife Village, close to the city of Echizen. His knives are well known throughout Japan and also around the world for their beautiful, unique-looking design and superior quality. Hammer's dents on the blade are his signature finish, and just like with snowflakes, not a single dent is alike. Needless to say (but we will say it anyway), his knives don’t only look great but they’re also made of high-quality steel and have a razor sharp, long-lasting edge.
Before opening his own smithy, Kurosaki-san was the apprentice of Hiroshi Kato, a master blacksmith with more than 50 years of knife-making experience. Kato-san is one of the founders of Takefu Knife Village, where now more than 10 master blacksmiths make knives by hand and put them on display for visitors to admire and learn more about their craft. Kurosaki-san is the youngest blacksmith to be granted the title of Master Nokaji by Takefu Knife Village Association and is a senior teacher there.
☝️When you visit Japan, make sure to put the Takefu Knife Village to your itinerary!
Here's a short video of Kurosaki's workshop:
Blade shape: Petty
Steel type: Aogami Super
Blade construction: San-mai / hollow grind V-edge / tsuchime & kuro-uchi
Hardness (HRC scale): 62-63
Overall length: 250mm (9.80")
Blade length: 120mm (4.7")
Blade height: 31mm (1.2")
Spine thickness: 1.60mm (0.1")
Weight: 65g (2.3 oz)
Handle length: 115mm (4.5")
Handle type / wood: Japanese / Rosewood
Kanji on the blade:
Blacksmith: Yu Kurosaki
Location of the smithy: ECHIZEN - TAKEFU KNIFE VILLAGE / Fukui Prefecture / Japan
☝️ Japanese kitchen knives in our store are handmade from natural materials. Slight variations in color, texture, weight and other dimensions are possible. We try to give a good photographic representation of our products, however computer screen resolution and colors do vary, so products might not look exactly as they are seen on screen.
☝️ THIS KNIFE MAY DEVELOP PATINA
Knives made of carbon steels can, due to their low chromium (Cr) content, discolor and develop patina. The knife is the most sensitive when it is still new and a patina had not developed yet, but later, patina will protect the blade. These types of knives require a touch more care:
✔ Wipe it regularly with a clean and dry cloth (you can also do this during use).
✔ After use, rinse it with lukewarm water and wipe it dry.
✔ Coat it regularly with knife maintenance oil or plain refined sunflower oil.
✔ Store the knife by wrapping it in paper which will absorb moisture and protect the blade.
A patina is a thin layer that forms on the surface of oxidized steel and protects it from further oxidation. The patina should not be confused with rust. Patina protects the blade, while rust causes corrosion and deterioration of material, so it should be removed (see Rust erasers).
→ For in-depth information about patina, read our dedicated post on patina.
GENERAL KNIFE CARE TIPS:
Blade wear depends on the quality of steel, usage and maintenance of the blade. Japanese knives are made of high-quality steels. Follow these tips to keep your Japanese knife in top-notch shape:
✔ Use a wooden, plastic or rubber cutting board.
✔ After use, wash the knives and wipe them dry.
✔ Use a magnetic rack, knife blocks, or use protective knife sheath (saya).
✔ A good cutting technique is your best bet to prolong sharpness.
✔ Use sharpening stones to sharpen the knife.
❗️Don’t leave the knife in the sink. Wash it by hand.
❗️Don’t wash the knife in the dishwasher.
❗️Don’t use the knife on glass, ceramics, marble or steel surfaces.
❗️Don’t scrape the food off the cutting board with the edge of the blade. Use the spine of the knife instead.
❗️A knife is a tool intended for specific use: it’s not a can opener, screwdriver, trowel, wire cutter, hammer etc. Kitchen knives are meant for preparing food.
→ For more details, read our guide on Maintenance of Kitchen Knives.
🤙 Contact us if you need some help. We reply within 1 business day.
- €10 - flat worldwide rate with DHL Express (express delivery, 2-5 business days).
- FREE - all orders over €300 (DHL Express).
- United Kingdom - shipping to UK costs €15. All orders are shipped with UPS Express (2-3 business days). Free shipping on orders over €300.
- Russia - shipping to Russia costs €40*. All orders are shipped with EMS postal service.
*or more, depending on the weight
DUTIES AND IMPORT TAXES:
We ship all orders DDP (duties & taxes paid). This means you will not be charged for any import fees and taxes (including VAT). All our prices are final. The price you see at checkout is the final price, no hidden costs.
- Europe: 1-2 business days
- US & Canada: 2-4 business days
- Rest of the World: 3-5 business days
Our return policy lasts 30 days. If more than 30 days have gone by since the day you received your order, unfortunately we can’t offer you a refund or exchange.
Each knife comes with:
✔️ Instructions and knife care leaflet.
✔️ A preventive Band-Aid – the knives are very sharp! 😉
✔️ Original box from the blacksmith, which we wrap in an old Japanese newspaper sheet – so every knife is ready to be passed on as a gift as soon as it hits your doorstep!
✔️ We also offer a special gift wrapping option with the traditional Japanese washi paper.
Still doubting which type of Japanese knife should best fit your needs? We created a quick, 5-steps quiz to help you find the perfect knife based on your cooking skills and the type of food you prepare.