What is Kurijiri in Japanese Katana terminology?

The term "Kurijiri" (栗尻, くりじり) refers to a specific shape of the tang end (Nakagojiri) of a Japanese sword. This design is characterized by a curvature that resembles the shape of a chestnut (Kuri in Japanese). This is the most common shape for the tang end, seen in both old and new Japanese swords. Depending on the shape, the name can change. For instance, if the angle on the blade side is steep, it is called "Haagari Kurijiri" (刃上がり栗尻). If it is evenly rounded and shallow on both sides, it is referred to as "Hirayama-gata" (平山型).