What is Goheigata in Japanese Katana terminology?

The term "Goheigata" (御幣形, ごへいがた) refers to a unique shape of the tang (Nakago) of a Japanese sword, characterized by its stepped design that resembles a "Gohei", a tool used in Shinto rituals. A Gohei is typically made from hemp, cotton, or paper, and is used for purification purposes. This particular tang shape is only seen in the works of Ise no Kami Kuniteru, a swordsmith from Settsu Province, who produced swords after 1690 (the 3rd year of the Genroku era). This terminology is used to describe the specific characteristics of the sword's structure, contributing to its overall aesthetic and functional design.