In this technique, lines are carved into the surface of metal and different metals are inlaid in the carved-out lines, with the differences in the color and texture of metals creating the design. There are a variety of techniques such as hirazogan (flat inlay), in which flat sheets are inlaid to be the same height with the ground surface; takaniku zogan (high mounted inlay), where material is set on a high-relief metal ground; and nunome zogan (texture inlay), in which thin metal leaf is hammered into a carved pattern.
How to do metal inlay
"What Are Traditional Crafts? -A Guidebook to Seeing, Learning, and Enjoying-" Edited by the Japan Kogei Association Eastern Branch. Published by Unsodo ／ List of works English translation: Kazuko Todate (Art critic / Art historian)