Kakuri | High-quality Traditional Japanese Hand Tools – Kakuri Sangyo

Genno Hammers, Octagonal Head, Silver Colored, Double-wedge

¥5,100

・The wooden wedge and steel wedge are driven in a crisscross pattern to create a solid structure that is difficult to pull out.
・The octagonal shape of the head allows for side striking in confined spaces where there is no space to swing the Genno.

Head Material: ‎Carbon Steel

Handle Material: ‎Oak

Ships within 5 business days.

Product information

  • 115g
Head weight: 225g (about 4 oz)
Head Length: 60mm
Head Thickness: 17mm
Overall Length: 328mm
  • 225g
Head weight: 225g (about 7.9 oz)
Head Length: 78mm
Head Thickness: 22mm
Overall Length: 328mm
  • 300g
Head weight: 300g (about 10.6 oz)
Head Length: 87mm
Head Thickness: 25mm
Overall Length: 328mm
  • 375g
Head weight: 375g (about 13.2 oz)
Head Length: 90mm
Head Thickness: 27mm
Overall Length: 330mm

Dual Striking Faces with Distinct Shapes


This hammer features two striking faces: one flat and the other slightly curved.


A traditional genno hammer that performs well in various situations, with a design especially effective for nail driving.

By driving the nail on a flat surface at the beginning and then on a curved surface at the end, you can avoid scratching the material surface.

Side Face Usable for Nailing

In tight or awkward spaces where a full swing isn’t possible, the flat side of the octagonal head can be used to drive nails effectively.

This feature makes it especially useful for interior framing, cabinet work, and other applications where space is limited.