SKU: 27317592822

Yu Kurosaki "Kokusenei" Aogami Super 210mm Gyuto

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Description

Yu Kurosaki "Kokusenei" Aogami Super 210mm GyutoMaster 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: Gyuto
  • 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: 210mm (8.3")
  • Blade Height (at heel): 44mm
  • Spine Thickness
    • Above heel: 1.9mm
    • Middle: 1.9mm
  • Handle
    • Shape: Hachikaku (Octagonal)
    • Material: Teak
    • Kuchiwa: Black Buffalo Horn 
    • Length: 132mm
  • Overall Length: 364mm
  • Weight: 147g (5.19oz) 
  • 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
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SKU: 27317592822

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Kimberly Farnham
Waukegan, US
★★★★★ 4
Great for small dogs
Color: Four colors, Size: 5cm (ball only)
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Reviewed in the United States on February 28, 2026
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Jay
Bozeman, US
★★★★★ 5
Good and comfortable toe socks
Size: 10-12, Color: Black 5 Pairs
First time wearing toe socks. I bought them to help prevent athlete's foot between the toes, which I'm prone to getting. Being a guy, I did have some reservations because I thought they'd look silly or whatever but I went ahead and bought these since they're going inside shoes anyway. I'm so glad I did! My only complaint is that the length of the toes are a bit short. In shoes I wear a men's 11 and I ordered 10-12 in these socks. The overall length is perfect but the toes are a bit too short and won't go all the way back to my webbing in the 1st and 2nd interspaces. The other toes and interspaces are fine. It's a minor complaint and not enough to remove a star. Overall I'm very satisfied with the product. I've suffered from Morton's Neuroma in both feet and various interspaces all of my life. I think I've finally found the solution. I've been walking 4.4 miles a day for over a month now. Something I've never been able to do. I wear these ZAKASA toe socks, along with the Dr. Wolf orthotics which have good arch support and a metatarsal arch just behind the metatarsal heads. I also wear the Bronax shoes which have a wide forefoot to let the toes spread out. The combination of the shoes, socks, and orthotics has worked wonders on my feet! No athlete's foot either! I highly recommend these ZAKASA toe socks. I've bought two 5 packs already. No regrets!
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Reviewed in the United States on September 26, 2024
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Jay
Houston, US
★★★★★ 5
Great quality and price per pair
Size: 10-12, Color: White 5 Pairs
Had these about 6 weeks now and am very pleased with how they've held up so far. I've gone through 2 other brands before this and will be sticking with them as long as they continue to hold up. Seams are still good, toe hasn't worn through at the toenail, no visible fading/wear on the pads of the feet. They are still annoying to straighten out after washing like all other toed socks, but the fit has held up and elastic is still snug and comfortable after daily wear (I did buy 2 packages, so they do get rotation before being worn)
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Reviewed in the United States on December 9, 2025
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Kevin S.
Louisville, US
★★★★★ 5
Good for wearing with Vibram Fivefinger shoes
Size: 8-10, Color: Black 5 Pairs
They are good, comfy socks that fit well on a size 43 eu (9.5-10 US) foot in medium. Be aware that these are the same socks that you get when you order Caidenieu toe socks and dozens of other listings as well. So just buy the cheapest ones you can get. They come in the same bag with the same cards and everything. I wear them with my vibram fivefinger shoes very comfortably.
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Reviewed in the United States on February 20, 2026
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Yunus al-Jadeed
Battle Creek, US
★★★★★ 4
Great socks but overly snug
Size: 13-15, Color: Black 5 Pairs
Socks fit great. Very comfortable. The elastic around the ankles gets tight and uncomfortable as the day goes on though. Durable after many washes and they do not shrink. Colors don’t fade. They keep the toes warm and separated, which provides some bunion pain relief.
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Reviewed in the United States on July 28, 2025

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