Uchidekozuchi

 The Uchidekozuchi is a powerful hammer used by Sage of the Moon:Hamura Ōtsutsuki. It was said to be his most powerful offensive weapon even surpassing the Sword of Totsuka and the Dragon Blade. The hammer has one major ability, the ability to generate vibrations. The hammer can create vibrations or shock waves through any medium, including air, water, ground, and even space. The user can control how powerful the vibrations are by focusing a certain amount of chakra into the hammer. If the user put the same amount chakra they would put into a Wind Release: Rasenshuriken the user could easily destroy the strongest metal on earth. The swing does not matter as much in this weapon. If the user possesses great control over their chakra as well the hammer, they would have the ability to to extinguish forest fires with a single swing or create volcanos. Theoretically if the user had enough reserves and control he/she would be able to send the moon flying towards the shinobi world.

In the air and ground the hammer creates crack. In the air it looks like as if the user is creating tears in the dimension. In water and other liquid substances the vibrations create waves.

Trivia

 * The image of the hammer was made by http://zanpakuto-leader.deviantart.com/