“ Mari at watashi to tokyo explains how they are so common that sense of ownership is very low. “Actually at the office, so many people use that umbrella that it is impossible to tell which one is mine or yous. So we take one when it suddenly rains, without meaning any harm. People seem to think as if the clear vinyl umbrella is freeware. Almost automatically, people collect vinyl umbrella like this. Ah, I do the same.
