The Unokubi Zukuri Tanto, as the name implies, has an unokubi zukuri blade shape. The term unokubi translates to “cormorant’s neck”. It refers to the tapering of a portion of the back of the blade giving it a false edge, while retaining the shape of the kissaki. The blade has a small groove called “soe-hi” that runs along the shinogi or ridge line of the blade. It also has a “koshi-hi” which is a short groove with a rounded top. The koshi-hi usually suggests the sword of Fudo Myoo. It’s meaning is the same as the “Ken” horimono (engraving) which is the symbol of power of Buddha (or any Buddha). It’s the most simple symbol of prayers. A koshi-hi with a longer soe-hi suggests a Buddha with his polearm.
Stocks from August 2019 onwards, now have a new fuchi-kashira that’s the same as on our Raijin katana and wakizashi. On the new kashira, you’ll see Raijin’s companion, the demon Raiju (“thunder animal” or “thunder beast”). Raiju is generally calm and harmless, during thunderstorms, it becomes agitated and leaps about in trees, fields, and even buildings (trees that have been struck by lightning are said to have been scratched by Raiju’s claws). This tanto would complement the Raijin Katana and Raijin Wakizashi pair.