It literally isn’t racism though. You can disagree with it and think it should be banned, but there is no interpretation that it can realistically be called racism

I lived in Japan for a while. I’ve seen a couple places with a sign like this. In my experience every place like this is perfectly willing to have foreigners that speak Japanese. They simply don’t want to deal with the hassle of a language barrier

I should also note these places were always in touristy areas. If they don’t have a sign like that, they’ll end up with majority English speaking customers, because Japanese customers prefer places without rowdy tourists that can’t speak the local language. I did too. Going out for an after work beer, you want an entirely different atmosphere from tourists getting hammered