I went to Japan a few years ago and also encountered some shops which had signs that said "no foreigners allowed". It was somewhere in Kyoto if I'm remembering

I went to Japan a few years ago and also encountered some shops which had signs that said "no foreigners allowed". It was somewhere in Kyoto if I'm remembering correctly. Nobody bothered me or was disrespectful at any point in my trip. Edit: it was in small back alley shops which had long lines of various restaurants. You had to really poke around to end up in those hidden spots.