"Aki no kaze no bokuto"
bokuto are the wooden swords used to train samurai or in this case monks This bokuto was carved from a wery thick wood, oiled and inbued of the souls of the master monks training the newbies.
It's a sword, but it makes crush damage instead of slash damage. If wielded by a monk, he can canalize his "ki" in the sword making a range attack or double the damage in a close attack