SKU: 68372837045

Yu Kurosaki "Kokusenei" Aogami Super 170mm Bunka

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Description

Yu Kurosaki "Kokusenei" Aogami Super 170mm BunkaMaster Kurosaki has advanced his "Senko Ei" series by introducing the "Kokusenei," meaning "Black Sparkle." This Kurouchi version retains all the qualities of the original Senko Ei but features Aogami Super steel at its core. It's an excellent choice for those who appreciate Yu Kurosaki's craftsmanship and grinding but prefer carbon steel over the original R2 SG2 steel. Spec: Origin (Made in): Echizen, Fukui Prefecture, Japan Brand: Yu Kurosaki

Master Kurosaki has advanced his "Senko-Ei" series by introducing the "Kokusenei," meaning "Black Sparkle." This Kurouchi version retains all the qualities of the original Senko-Ei but features Aogami Super steel at its core. It's an excellent choice for those who appreciate Yu Kurosaki's craftsmanship and grinding but prefer carbon steel over the original R2/SG2 steel.

 

Spec:

  • Origin (Made in): Echizen, Fukui Prefecture, Japan
  • Brand: Yu Kurosaki
  • Craftsman: Yu Kurosaki
  • Knife Type: Bunka
  • Blade
    • Construction: San Mai
    • Grind: Double-edged Blade (50/50 Grind)
    • Hagane (Core Steel): Aogami Super 
    • Jigane (Cladding): Stainless Steel
    • Hardness: 63-64 HRC
    • Hand-sharpened
  • Blade Finishes:
    • Signature Tsuchime (Hammered)
    • Kurouchi
  • Blade Length: 170mm (6.7")
  • Blade Height (at heel): 47mm
  • Spine Thickness
    • Above heel: 1.8mm
    • Middle: 1.8mm
  • Handle
    • Shape: Hachikaku (Octagonal)
    • Material: Teak
    • Kuchiwa: Black Buffalo Horn 
    • Length: 127mm
  • Overall Length: 313mm
  • Weight: 119g (4.20oz) 
  • Engraved Mark: In Japanese Kanji "Kurosaki Yu" (黒崎 優)

About Yu Kurosaki 黒崎 優

A young artisan in his forties, Yu Kurosaki has become one of leading knife makers in Japan, winning top awards and attention for his hand-forged knives especially his Tsuchime finish. Inheriting over 700 years of knife making skills from previous generations of Echizen artisans, Mr Kurosaki has focused his career on making knives that give unforgettable impressions and incredible cutting pleasures. Yu's unique Tsuchime design, as seen in his Shizuku and Fujin series, are not only aesthetically magnificent but also incredibly functional when it comes to making food less likely to stick to blades. Today, Yu's works, hand made in small batches, have become so popular overseas that his top knives like the ones featured in Burrfection Store are increasingly hard to come by.

Care:

 

Aogami Super (Blue Super) steel is considered the most superior Japanese high carbon steel for knife making. It is not stainless, therefore you must wipe your knife dry after each use, in particular the core steel not covered by the stainless cladding. Patina will develop over time, which will appear as “discoloration” on the cutting edge, but that is the nature of carbon steel - not a defect. The stainless cladding covers a large part of the blade, making maintenance easier but still preserving the cutting and sharpening pleasure of the Aogami Super core. Avoid cutting into bones, frozen foods, hard fruit pits.

Cutting Surface:

Recommended cutting surface: wood, rubberized boards and high-end composites, and quality plastics such as polyethene make acceptable cutting surfaces, and will help protect and prolong knife’s edge. AVOID glass, metal, countertops, and other rigid, non-forgiving surfaces.

Sharpening:

We recommend sharpening all quality Japanese knives on whetstones, as we believe they yield the best results for your knives. 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
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  • Final sale items are not eligible for returns or exchanges.
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SKU: 68372837045

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★★★★★ 5
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Reviewed in the United States on July 16, 2025
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Elle Zena
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★★★★★ 5
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This puzzle toy has quickly become one of my dog’s favorite sources of entertainment. It keeps him busy, challenged, and happy. The variety of difficulty levels gives him a challenge, and it is so fun to watch him work through the puzzles. Even when he is just playing with individual pieces, he is entertained. It is also very user-friendly. Setup is simple, and it is not overly complicated for the owner to manage. Cleaning is surprisingly easy, too. The pieces wipe down well, and nothing traps food or slobber, which is a huge win compared to some other toys we have tried. Functionality-wise, it is fantastic. The levels of difficulty actually work as intended, and I like being able to adjust them based on my dog’s mood. It is durable, too. The weight and sturdiness of the pieces keep them from sliding around too much during play, and they are tough enough to withstand my Aussie’s powerful chewing without damage. I also like how it is numbered so you can quickly move onto the next level without too much thought. With that, I have noticed the higher levels are challenging, and my Aussie has yet to get through them all. Eventually he gets bored and stops trying. It is a high-quality, fun, and engaging toy that provides mental stimulation, holds up to rough play, and is easy for me to maintain. Definitely one of the best puzzle toys I have tried!
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Reviewed in the United States on August 19, 2025
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★★★★★ 5
She loves it!
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Tried it as soon as we received it. My dog is a doberman german shepherd mix. I used multiple levels to see what my dog can figure out. It kept her pretty occupied for about 15 minutes and then I readjusted the last level so she could figure it out. With that being said, it can definitely keep them busy for longer! This is going to be a great toy, we love it already. Very durable for my girl, she's a pretty heavy chewer. Very easy to clean because it's a rubber material. The overall puzzle design is also great, really gets them to think. Very easy to stuff treats or kibble inside. Lastly, I LOVE that it's blue and yellow! I wish more toys were in blue and yellow because dogs are color blind! I would definitely consider getting more pieces in the future.
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Opinionated
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Fun for dogs with anxiety or bored. Easy to fill and clean with different options to build.
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★★★★★ 5
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I have a chewer who gets bored in the afternoon. She loves these Lego blocks. They’re sturdy enough for a big chewer and they hold her interest . She really enjoys figuring out how to get her breakfast!
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