Samurai Sword SET, contains 4 types
If you want the sword to bend like a whip like in the anime, load the cz mk sword 00 asset and then use the *IK for Custom Unity Assets* plugin to adjust its bones.
For detailed instructions, please see How to use this plugin
Mitsuri Kanroji SET is here
https://hub.virtamate.com/resources/demon-slayer-mitsuri-kanroji-set-full.50668/