Amenonuhoko (Kaiser)

Ame-no-nuhoko (天沼矛, heavenly jeweled spear) is the name given to the [Wikipedia.org/wiki/Naginata naginata]. It was said to have been used by powerful being to raise land-masses from the sea or ground. According to an unknown swordsmen it was in creating the first land. The being then went to the bridge between heaven and earth, Ame-no-ukihashi ("floating bridge of heaven"), and churned the sea below with the naginata.

Amenonuhoko give the weilder the ability to use Water Release and Wind Release. While greatly enhances Water Release and Earth Release jutsu by a large margin for those who can use the releases already. It can also create a water source for Water jutsu out of seemingly nothing. It seems that this weapon is only given to those that are worthy. It is currently in the possesing of Mikazuki Minamoto. Its form changed from a spear to a sword after Mikazuki held it for the first time.