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Yu Kurosaki AS Kokusen Ei Petty 130mm

$199.00 USD

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Knife Specifications

We strive to provide accurate measurements and photographs of our products. However, due to the handmade nature of many items slight variations may occur.

Style

Petty

Blade Material

Blue Super Core, Stainless Tsuchime Clad

Handle Material

Octagon Ebony & Blonde

Bevel

Double Bevel

Spine Thickness

1.8mm

An In depth look

Blade Type

The Petty knife, a quintessential tool in Japanese cuisine, is a smaller utility knife used for precise, delicate tasks. Often considered a smaller sibling to the chef's knife, it excels in hand-held tasks like peeling, trimming, and intricate cutting. Its versatility makes it an essential for detailed culinary work.

Steel Type

Japanese Blue Super Steel, an elite variant of the "Aogami" series, is a high-carbon steel alloyed with chromium, tungsten, and added vanadium. This composition enhances its wear resistance, edge retention, and overall toughness. It will still rust if left wet for too long, but not as quickly as any of the other carbon steels. Favored in fine knife crafting, Blue Super Steel is renowned for producing exceptionally sharp and durable Japanese knives.

Care Information

This knife is made from a high-carbon steel and as such, will require a little more care than a regular off-the-shelf knife. It must be dried shortly after use, as prolonged exposure to moisture can cause rust spots to appear. A very light coat of oil during storage also helps to prevent rust spots. A patina (colouration and seasoning of the steel) will occur with use.

Introducing

Yu Kurosaki

Yu Kurosaki has become one of Japan’s most celebrated blacksmiths — known for his bold aesthetic choices, cutting-edge techniques, and dedication to pushing the boundaries of traditional knifemaking. Beginning his journey in his teens and apprenticing for 12 years under Hiroshi Kato, Kurosaki established his own forge in 2014 and has since earned recognition from the Japanese government as the youngest ever to be named a Master Blacksmith.

His knives are instantly recognizable for their striking Tsuchime and Suminagashi finishes, thin grinds, and use of high-performance steels such as SG2, HAP40, and stainless-clad Blue Super. Kurosaki’s Fujin series, with its dramatic wind-patterned hammer finish, helped cement his reputation as a blacksmith who blends artistry and technical brilliance in equal measure.

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Why Pro's & Enthusiast Choose Us

Some of our reviews

This thing IS THE BUSINESS!

Words can't explain how amazing this knife is to use and gaze at! It's my second bunka and my go to knife for everyday prep. Gyuto's aren't getting a look in at the moment. I LOVE it. Thanks Chefs Edge 👊🏽

Daryl D'Suze

Nigara Hamono SG2 Raindrop Damascus Bunka 180mm - Ebony

Super Thin Bevels

The bevels being so thin makes it easy to achieve a crazy sharp edge and cut dense vegetables rather than splitting them. The kiritsuke tip also makes precise cuts such as on garlic possible. A pleasure to use

James Palmer

Nigara Hamono SG STRIX Kiritsuke Nakiri 165mm

Great product, great service

Very happy with my purchase. First time customer, ordered and received a knife that had a chip which occurred during shipment. The staff at Chefs Edge were very prompt in communication and really helpful in resolving the matter. They sent out a new knife and arrived in time for a birthday. The knife itself is great quality and looks better than the photos. Overall, very happy and will be a return customer!

Jordan Tayoun

Morihei Kyomitsu Blue 2 Kurouchi Gyuto 210mm - Ebony & Blonde

Beautiful Knife

As the title says, an absolutely beautiful knife. Even better than the photos. Shipping was also reasonable. Very happy, would definitely recommend.

Kyle Kidder

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Fantastic knife with beautifully curated handle

Got this as a gift for one of my younger cooks who has been going above and beyond this year. Not only is the caretaking aspect of high carbon steels such as shirogami a great teacher for any future knives they may own, but its such a beautiful tsuchime finish with a fantastic grind that I found myself drooling over it aswell. 10/10 recommend not only Tsunehisa as a maker but Chefs Edge as a curator and purveyor of immaculate kitchen knives.

Evan Rolley

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Best bread knife ever !

it was best decision for me to purchase this knife! Smooth and effortless prep! Especially working with 300-500 portion !

Axel Lemasoa

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Perfect knife!

It was absolutely razor sharp knife. Lightweight even if it’s 240mm knife. Thanks chef’s edge, it came also fast and secured with a beautiful delivery box.

Don Hyndryx Molleda

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