A tool used to cut Uchigumori Koppa or Narutaki Koppa when making Hazuya and Jizuya.
Handmade by leading Japanese blacksmiths.
It was developed in our store as a special tool for cutting Koppa.
It has a sharp tip to make it easier to split Koppa.
You can order Koppa from the following link.
Uchigumori Koppa
https://www.namikawa-ltd.com/product/50
Narutaki Koppa
https://www.namikawa-ltd.com/product/51
Narutaki Koppa High Quality
https://www.namikawa-ltd.com/product/1560
