Japanese sword fittings Tosogu (刀装具), these support the mounting koshirae (拵え) to hold everything together. The koshirae (拵え) is the casing from the Nihonto when it is worn by its owner in the Obi. Koshirae (拵え) come in various styles and class, from cheap to extremely expensive. Koshirae (拵 え) can be found for: Tachi, Katana, Wakizashi, Tanto etc .
When a Nihonto is NOT worn it will be stored in a “Shirasaya”. This storage mounting is made of, Japanese magnolia wood. The “Shirasaya” consists only of a Saya and Tsuka.