[sdbri]

Personally speaking, I've never had any trouble going anywhere for not being Japanese. Occasionally I have for not speaking Japanese, but I proved this distinction by learning it. Had no problem since.

I've never seen a "Japanese only" sign in Japan in all my years, although I know they used to exist and perhaps you can still find one. That said, there are definitely "English only" signs in the US, and certainly a ton of "whites only" signs in the past. These things are usually a matter of time before they disappear in modern societies.

Interestingly enough, there are often signs saying you can't have a tattoo (which is associated with Yakuza). They make very bad customers.