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Hiroki Square Genno Japanese Hammer – Traditional Rough Forging (300 g / 565 g)

Hiroki Square Genno Japanese Hammer – Traditional Rough Forging (300 g / 565 g)

Hiroki Aida

$261.00 USD
$261.00 USD
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Weight variants

The Hiroki Fire-Forged Square Genno is a traditional Japanese hammer hand-forged by Hiroki Aida in Sanjo, Japan. Its square head offers a stable and precise strike, while its raw forged finish retains the marks of artisanal craftsmanship, making each piece unique.

Crafted according to the tradition of Japanese master blacksmiths, this genno combines control, balance, and authenticity. Slight variations in texture and appearance may be present due to its entirely manual manufacturing process.

  • KindTraditional Japanese hammer (Genno)
  • ShapeSquare Head
  • FinishingFire-forged (raw forging)
  • Black-smith:Hiroki Aida
  • OriginSanjo, Niigata – Japan
  • MaterialForged steel
  • Manufacturing100% handcrafted

Available sizes

  • 300 g

    Head length: approx.80 mm
    Use: fine woodworking, maximum control


  • 565 g

    Total length: approx.105 mm
    Use: more powerful strikes, thin frame

⚠️ Due to the handcrafted nature of the product, slight variations in dimensions and weight are normal.

  • High-end traditional Japanese hammer
  • Square head for precise and legible typing
  • Raw, fire-forged finish (visible forging marks)
  • Traditional blacksmithing in Sanjo, Japan
  • Precise adjustment of the sleeve hole
  • Exceptional balance and control
  • Each piece is unique
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