太刀鎺 Tachi Habaki
What is Tachihabaki in Japanese Katana terminology?
Among the Habaki (collar), it is often used for Tachi (a type of Japanese sword). Generally, it has a single structure without a Hirani (flat meat) and is filed vertically. Although it is inferior in terms of decoration to the double structure, it can be said to be a form suitable for actual battle use due to its excellent mobility.