Board Thread:Boruto Discussions/@comment-1512913-20190608172919/@comment-11830817-20190611063828

Here is my theory (it goes along with the most prevailing theory): Jigen is a human who at some point defeated and killed/nearly killed kagyua’s parter, who gave him the karma. Who is then revived in their 10-tails form via a piece of a god tree or similar. He then uses their chakra to prolong his life and amp his powers. this either isn’t enough for him to be truly immortal or he just wants more power, so he plans to reincarnate into kawaki using his karma (like others have suggested). Also the reason he waited this long is presumably to develop the ninja tech to enable his plan.