Just a quick story about Japan. One day I was running back from kyudo to catch the last 20 min of iaido practice and it was not where I looked first so run to an other place but forgot my phone on the table there. After class I run back when I realized but it was already too late, the buildings were closed. So I went back next day and it was at the same place, untouched, waiting for me. Nobody even looked at it because it wasn’t theirs.
Same reason you can see umbrellas here and there and hats put on tables.
I was always hearing these stories about how people don’t touch things that are not theirs here, but seeing it real life is quite different.