Ashisogi Jizo is Mayuri's Zanpakutō. Ksitigarbha is a bodhisattva that watches over children and the underworld. In Japan, where he is known as Jizo, he looks rather like a baby dressed as a Buddhist monk. In Zanpakutō form, Ashisogi Jizo has what looks like a giant baby's head on it. Its hilt is wrapped in cloth, and has several spiky protrusions sticking out right below the blade, which appear to resemble leaves.
Shikai
Bankai