I think it's the mystery that will stay unsolved forever. He did everything to hide himself.
But indeed he has gift us with the biggest digital asset of the time. we all seeing many rumours like many are pretended that they have met stoshi nakomata i was watching such kind of video on social media a person was pretended to be stoshi nakomata.
Thus, this is the fact this mystery remain mystery but before going away he have gifted world with the biggest digital asset.