SKU: 43370928583

Yu Kurosaki "Kokusenei" Aogami Super 160mm Nakiri

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Description

Yu Kurosaki "Kokusenei" Aogami Super 160mm NakiriMaster 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: 160mm (6.3")
  • Blade Height (at heel): 52mm
  • Spine Thickness
    • Above heel: 1.7mm
    • Middle: 1.8mm
  • Handle
    • Shape: Hachikaku (Octagonal)
    • Material: Teak
    • Kuchiwa: Black Buffalo Horn 
    • Length: 127mm
  • Overall Length: 300mm
  • Weight: 149g (5.26oz) 
  • 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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Exchange/Return Notes
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SKU: 43370928583

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Amazon Customer
Dallas, US
★★★★★ 1
Little glow that does not last
Size: 2.5in Medium, Size: 2.5in Medium
Total waste of money. These sat all day in Texas sun then were under a 60 watt lamp until I took them outside at night. There was barely any glow to the balls and the littl glow they had didn't last 10 minutes. I thought they were same size as a chuck it ball but they are slightly smaller. The 3x5 card in photo should sit evenly on top of all 3 balls. It doesn't because these are smaller. I have a 70 pound Malinois and these were just too small for me to feel comfortable using as I had concerns of them going down his throat. If you are looking for a fun night time toy you need to look elsewhere. I'd give zero stars if I could.
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Reviewed in the United States on January 9, 2026
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RachelG
Battle Creek, US
★★★★★ 5
MY DOGS' NEW FAVORITE BALLS!
Size: 3.5in Large
They are the greatest! Awesome squeaking, lightweight, bouncy, durable, fast and bright light have made my dogs have hours of fun and exercise. I'm hoping more get back in stock since I've acquired another dog who loves them. They have all the fun properties of a favorite toy! UPDATE... After the second purchase of these balls, they have now replaced the old "Chuckit" balls as my dogs' choice but they fit perfectly in the XL Chuckit handheld launcher! I hold the ball in the launcher up next to my outdoor back light for a few seconds and hurl it away multiple times and they really run for them like there is no tomorrow. Day or night these balls stimulate my dogs' enthusiasm for running and it is a joy to play with them and watch how much fun they have.
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Reviewed in the United States on March 25, 2025
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Tammy H
Charlottesville, US
★★★★★ 4
Great value
Size: 2.5in Medium
Love these balls. They are a great price, good quality, durable, really bright glow, bounce higher than my chuck it brand but they are a slight bit smaller. This is why I knocked off one star because they are loose in my ball thrower and more difficult to throw. Other than that, great product!
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Reviewed in the United States on February 21, 2026
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Katherine Bopp
Phoenix, US
★★★★★ 5
Glow in the dark squeaky balls for dogs
Size: 2.5in Medium
She loves them, but I am also going to look at ordering the larger 3.5" ones.
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Reviewed in the United States on May 11, 2026
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jewelrycook
Houston, US
★★★★★ 5
Bouncy, not hard, and good value.
Style: Fetch Balls (Pack of 10), Size: 2.5 inch
Great balls for the ball launcher and not rockhard like some of the solid rubber balls. These have great bounce, and because of the two holes, they make a fun whistling noise as they fly through the air. My dogs love them and they are a good value. By the way, if you throw them too hard, they will go through chain-link and no climb fence because they squish a bit!
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