[Espy]

Actually, it is really difficult for all Germanic languages. Japanese is not related to any other language, at least not in spoken form. Sure, it draws from Chinese and Korean, but the three aren't in the same group of languages. And it's based purely fixed phonemes (so like, each written character produces one sound), so I think there's a lot less of the, say, t's sounding like d's or flaps, or stops, or such, among other common problems.