The Donkachi (ドンカチ Donkachi Pun off of "Tonkachi" (トンカチ "Tonkachi"), meaning "hammer") is the Armored Rider Arms Weapon granted either by accessing Donguri Arms or via the summoning ability of Kiwami Arms. It takes the form of a war hammer, with the head of said hammer taking the form of a stylized acorn.