SKU: 55070002213

Hatsukokoro "Kokugei" Aogami #1 Kurouchi 120mm Petty

Sale price$62.06 Regular price$68.95
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Ships within 48 hours · Estimated delivery Aug 7 - Aug 12

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Description

Hatsukokoro "Kokugei" Aogami #1 Kurouchi 120mm PettyCrafted from high quality Aogami #1 steel, this Hatsukokoro "Kokugei" Petty (also known as the "Black Whale" in Japanese) has been heat treated to a hardness of 62 HRC. Its distal tapered design ensures a seamless cutting experience, while the rough black kurouchi finish exudes the traditional aesthetics of hand forged Japanese carbon steel blades. During quenching, the uneven temperature distribution over the blade results in a gradient of colors

Crafted from high-quality Aogami #1 steel, this Hatsukokoro "Kokugei" Petty (also known as the "Black Whale" in Japanese) has been heat-treated to a hardness of 62 HRC. Its distal-tapered design ensures a seamless cutting experience, while the rough black kurouchi finish exudes the traditional aesthetics of hand-forged Japanese carbon steel blades. During quenching, the uneven temperature distribution over the blade results in a gradient of colors resembling a rainbow, making the knife uncoventionally appealing. This Santoku knife is not only easy to handle but also offers great value, making it an ideal choice for newcomers to carbon steel knives.

 

Spec:

  • Origin (Made in): Tosa, Kōchi Prefecture, Japan
  • Brand: Hatsukokoro
  • Knife Type: Petty
  • Blade
    • Construction: Sanmai
    • Grind: Double-edged Blade (50/50 Grind)
    • Hagane (Core Steel): Aogami #1 (Blue #1)
    • Jigane (Cladding): Soft Iron
    • Hardness: 62 HRC
    • Hand-forged, hand-ground, hand-sharpened
  • Blade Finishes:
    • Kurouchi
  • Blade Length (heel-to-tip): 120mm (4.7")
  • Blade Height (at heel): 39mm 
  • Spine Thickness
    • Above heel: 2.4mm 
    • Middle: 1.9mm 
  • Handle
    • Shape: Hachikaku (Octagonal)
    • Material: Ebony
    • Length: 115mm 
  • Overall Length: 251mm 
  • Weight: 96g (3.38oz) 
  • Engraved Mark (Front): In Japanese Kanji "Trademark Hatsukokoro" (登録 初心)


Care:

Aogami #1 (Blue #1) steel is a premium Japanese high carbon steel for knife making. Despite some corrosion resistant quality (for a carbon steel), it is not stainless, therefore you should wipe your knife dry after each use. Patina will develop over time. Rust may develop if left in prolonged contact with water or acidic food. Use a rust eraser to clean if rusts develop. 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 polyethylene 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:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 55070002213

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Melinda
Charlottesville, US
★★★★★ 5
sturdy & attractive
Color: Natural, Size: 4 Panel
excellent look and sturdy
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Reviewed in the United States on May 24, 2026
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Ramon Ray
New York, US
★★★★★ 5
Good product
Color: Brown, Size: 8 Panel
It is made well. It is longer than I expected which was good.
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Reviewed in the United States on March 17, 2026
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Sandrine Familaro
Whiting, US
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Impressive!
Color: Natural, Size: 8 Panel, Color: Natural, Size: 8 Panel
I found the right room divider after hours of research, featuring options for patterns, colors, practicality, aesthetics, materials, and prices. I am proud to have picked this one among so many others. It is classy, extremely versatile, easy to fold, unfold, and carry around. It is a central piece for all my needs, plus it was on sale when I got it. I can only praise it.
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Reviewed in the United States on February 9, 2026
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Sherry
San Leandro, US
★★★★★ 5
Lightweight and plus no assembly needed!
Color: Brown, Size: 6 Panel
Love it ! Lightweight easy to move or set up comes already assembled
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Reviewed in the United States on March 13, 2026
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LH
Draper, US
★★★★★ 4
Gets the job done
Color: Natural, Size: 6 Panel
Not super sturdy or durable but it gets the job done.
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Reviewed in the United States on February 6, 2026

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