The official translation is what I go by and it's spelt as Kishin.

But I get what you're playing at. Kishin's some kind of super powerful dude from a place that uses chakra and such, but not in the way we're familiar with. As if from a different country all together, outside of all the hidden lands. THAT is actually kind of interesting, I hope that's what they go for.

Also I'm done taking "they can't be put out by anything!" seriously since Amaterasu was supposed to be like that and it's obviously not true.