Watching an experienced craftsperson at work is always a privilege.
In this video, we have the opportunity to observe Ouchi-san as he forges a traditional Japanese chisel and works through some of the processes that give these tools their distinctive character.
Making a Japanese chisel involves far more than simply shaping a piece of metal.
The smith must control heat, hammering, geometry and timing while working with materials that behave very differently under the hammer.
Much of that judgement comes from experience: knowing when the steel is ready to move, how much force to apply, and when to stop and return the work to the fire.
The Forging Process
In the video, Ouchi-san works at the forge, heating and shaping the material through a series of carefully controlled steps.
Each hammer strike has a purpose.
The steel must be moved into the required form while maintaining the proportions and alignment that will eventually become the finished chisel.
Temperature is equally important. An experienced smith learns to read the colour and behaviour of the metal and adjust the process accordingly.
What appears from the outside to be a simple sequence of heating and hammering is, in reality, a series of small decisions made continuously throughout the forging process.
Why the Forging Matters
Forging establishes much of the basic geometry and structure of the tool before the later stages of grinding, heat treatment and finishing begin.
Japanese chisels are traditionally made with a hard cutting steel supported by softer iron or steel. This laminated construction allows the tool to combine a very hard cutting edge with a body that is less brittle and easier to work during manufacture and sharpening.
Getting those materials to work together successfully requires control throughout the forging process.
The quality of the finished chisel is therefore not the result of one dramatic step, but of many small processes carried out carefully and consistently.
The Value of Seeing the Process
It is easy to look at a finished Japanese chisel and focus only on the polished blade, the handle or the cutting edge.
Watching Ouchi-san work is a useful reminder of how much has already happened before the tool ever reaches the sharpening stone or the workbench.
The forge marks, hammer work and final geometry all begin with the decisions made at this stage.
Seeing that process firsthand gives a much better appreciation for the amount of skill and repetition behind what can otherwise appear to be a very simple hand tool.
