The Haniwa Staff is a Hardmode Summon Weapon that summons a haniwa soldier which follows the player and attacks enemies. The haniwa will try to get into melee range of its target and attack it using its sword. If the target can't be reached, it will instead use a bow to shoot arrows at it. Like other minions, the haniwa is invincible and follows the player for an unlimited amount of time, unless the player dies, exits the world, summons a replacement minion or cancels the buff. It takes up one minion slot.
The Haniwa Staff has a 33% chance to be dropped from Mayumi Joutouguu.