666 satan or o-part hunter as it is known as in the states is made by the naruto creator, Masashi Kishimoto's, twin brother,Seishi Kishimoto. thus some similarities occur like they both have demons inside of them, both were regected as children by the people of their village, and they both hold the strongest of the various demons inside of them. Jio has the power of satan who rumors say destroys civilazitions periodicly, but naruto has the power of kyubi, the nine-tailed demon fox, who with one swipe of its tail can destroy mountains. in a head on battle who would win?