Quality Management


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

In-Process Inspections

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

Production Management System

From order 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 to take swift action should trouble occur.

Pre-Shipping Inspections

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

Measuring Instrument Examples
Contracer, Coordinate Measuring Machine, Vision Measuring Machine, Microscope, Hardness Tester
Surface Roughness Tester, Endoscope, Gauge Block, and others

External Certification

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