What is Kiri in Japanese Katana terminology?

The term "Kiri" (切り, きり) refers to a specific type of file mark pattern, known as "Yasurime" (鑢目), on a Japanese sword. In this pattern, the file marks are applied horizontally and parallel to each other, creating a distinctive visual effect on the surface of the blade. This pattern is applied at a right angle to the ridge line, known as "Shinogi-suji" (鎬筋). This terminology is used to describe the specific characteristics of the sword's structure, contributing to its overall aesthetic and functional design.