At Nanjo Kobo, we place great importance on circular or closed-loop production —a practice that ensures no material is wasted and everything is given new life.
After casting, the used molds are crushed, finely ground, and carefully sieved by particle size to be reused as raw material for the next molds.
The water used in the mold-making process is rainwater collected at the workshop.
Even the metal shavings produced during the cutting and finishing of orin are not discarded; they are melted down and used again.
In this way, Nanjo Kobo has established an almost entirely sustainable production process with virtually no waste, with only a small amount of fragments that cannot be reused.

The workshop, built about 60 years ago, was designed with the goals of「eliminating waste」and「creating better sound with limited materials.」
Established during an era when resources were scarce, it embodies a spirit of ingenuity and resourcefulness that continues to serve as the foundation for the making of sound today.