応仁鍔 Onin Tsuba
What is Onin Tsuba in Japanese Katana terminology?
This is a Tsuba (hand guard of a Japanese sword) that features point and line inlays. It emerged during the middle of the Muromachi period. It is named after the Onin era, when a Tsuba craftsman living in Yamashiro started producing using this technique, developed it, and passed it on. There are items that have a Semon inlay (Semon Zogan) in brass on an iron base and are equipped with small perforations, and items that have small protrusions of brass similar to fish roe inlaid in a circular pattern in three or five stages at regular intervals, and geometric patterns drawn by line inlays.