Openings in the Tsuba for the Kogai (right side also called Kogai-hitsu) and the Kozuka (left side also called Kozuka-hitsu). The Kogai-hitsu has often the form of three half circles.
Openings in the Tsuba for the Kogai (right side also called Kogai-hitsu) and the Kozuka (left side also called Kozuka-hitsu). The Kogai-hitsu has often the form of three half circles.