nicsnicsnics, I'm sorry to say this, but you're an idiot.
Anyway, in the Settings look for a button labelled "ã’ã‚“ã”ãã‚Šã‹ãˆ" (or "ã’ã‚“ã”切り替ãˆ").
In those options, look for a button that looks like "英語" (or "ãˆã„ã”").
If that's not there, you're screwed. (I wish I could...