16/04/2026
Our Niigata copper pieces for NANAROKU are made one by one in workshops like this in Tsubame-Sanjo.
The process is shaped by specialization.
Forming, polishing, and finishing are carried out by different craftsmen, and each stage requires a high level of precision.
Copper is an especially delicate material.
Even the smallest scratch or distortion becomes visible, which is why the final quality depends on careful adjustments and strict inspection throughout the process.
Within NANAROKU, copper is not simply one material among others.
Because the form is standardized, the character of the material itself becomes clearer through heat conduction, mouthfeel, and the way it ages over time.
This is the kind of craftsmanship behind each Niigata copper piece in NANAROKU.