Wow didn't know the Japanese faced the same issues. That being said this was more of a highschool/early college problem. I don't know many mature/functioning adults that this would seriously affect.
I'm confused. How the kami show up in the miniscule world? I get there's a lot of time fuckery but how can the miniscule one have been waiting for her but come from the future?
Please don't listen to this person. Cold water is fine. Do not apply ice or ice water to the burn as that can cause tissue damage due to the skin already being fragile. Do not go below 2º C or 35.6º F.