All materials used in JHW molds are procured from trusted material manufacturers in Japan.
This enables material traceability and allows us to provide materials that are manufacturer-guaranteed.
We also guarantee stable quality by conducting heat-treatment in-house.

At JHW we use various measuring systems in our manufacturing processes to conduct in-process inspections.
With “no defects get passed on to downstream processes” as our motto, we prevent the transmission of defects by conducting inspections during each process.

From ordering to delivery, we manage due dates and production schedules using a production management system. This system allows us to keep our product delivery processes running smoothly and take swift action should trouble occur.

Before shipping products out, JHW uses high-precision inspection equipment to conduct strict shipping inspections.

Both JHW’s main plant and Kagoshima plant have received ISO9001 certification.