Board Thread:Questions and Answers/@comment-4802891-20160816043558/@comment-27107874-20160816054223

Don't really know about IOS's and such, but for me I'm just using my default (european?) Android Version. So I'd assume you don't need to use the japanese IOS once you've installed/downloaded the game.

I've recently switched phones and just re-downloaded the app from my download history. No questions asked. Everything works just great.