What is Nakagosaki in Japanese Katana terminology?

The term "Nakagosaki" (茎先, なかごさき) refers to the tip of the tang (Nakago) of a Japanese sword. It is also known as "Nakagojiri" (茎尻). This is the part of the sword where the swordsmith's individuality is often most clearly expressed, and it can vary depending on the era and the school of swordsmithing. The shape and details of the Nakagosaki can provide valuable clues about the sword's origins and the techniques used to create it. This terminology is used to describe the specific characteristics of the sword's structure, contributing to its overall aesthetic and functional design.