A double handed spear which is exclusively for fighters, valkyries and samurais. Every race but fairies can equip the weapon. The weapon has no restrictions over gender and alignment.
It is effective against insects and attacks fast towards it in one turn, but ghosts are immune to this. It can attack from front and back if its at the front, while front and a bit in the middle when at the back.
Other than that, Tonbokori doesn't have any notable increases -- specifically with spell-resistance, element attack and defense attributes nor status ailment infliction and resistance.