Earlier quoted context omitted.
My favorite little coincidence is that ending a sentence in "ne" turns it into a question in both Japanese and colloquial German, with exactly the same sense ("isn't it?").
I've noticed a similar similarity between the particle "yo" in Japanese and adverb "ju" in Swedish, both used for the same purpose at the end of sentences.
Swedish:"må" Japanese:"mo". "allowed to" Pronounced the same.
Expression: Swedish:"det går inte"(not possible, not allowed to), literally "that does not go" Japanese:"ikemasen"(not allowed to), literally "can not go".