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 11 - Aug 16

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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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Reviewed in the United States on May 27, 2025
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★★★★★ 5
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Size: 9 Ounce (Pack of 2)
This Korean bulgogi flavor is similar to Japanese teriyaki sharing an ideal balance between salty tangy soy sauce and sweet sugar perhaps bulgogi more garlic prominent and teriyaki more ginger. Nice to have a difference and enjoy both versions of barbeque flavors. Koreans can enhance the flavor with sesame oil and Japanese with miso. The pork used by Golden Island is top quality lean and tender vs. the sometimes inconsistent quality of USA mass market beef jerky.
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Reviewed in the United States on May 27, 2026
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Gunnar Ward
Chelsea, US
★★★★★ 5
Must have for any occasion!
Size: 9 Ounce (Pack of 2)
This jerky is hands down the best flavor and tenderness I’ve ever had from a bag of jerky. Honestly do yourself a favor and don’t open the bag unless you’re committed to eating the whole bag in one sitting.
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Reviewed in the United States on May 26, 2026
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Francine
New York, US
★★★★★ 5
Tasty treat in single serve packs! My new favorite snack
Set name: Baby Blues BBQ, 2 Ounce Pack of 8
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Reviewed in the United States on May 12, 2026
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Daniel Larue
San Leandro, US
★★★★★ 5
Definitely will buy again
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