Earlier quoted context omitted.
While it occasionally happens, in Japan they still have a sense of civic responsibility. They wouldn't do that. There's also the fact that you could (statistically) also forget your Macbook Pro in a crowded public park in Tokyo and come back 2 hours later to find it there untouched (and unstolen).
Wow. Was this ever (anecdotally) tested?
https://www.nationmaster.com/country-info/compare/Japan/Unit...
https://medium.com/@alascii/this-guy-left-a-laptop-in-a-toky...
https://www.attendly.com/the-astonishing-lost-and-found-cult...
https://japantoday.com/category/features/kuchikomi/japan-a-g...
https://livejapan.com/en/in-tokyo/in-pref-tokyo/in-tokyo_tra...
(Of course, whatever Japanese culture might be, Japan now also has millions of tourists each year, with whom, YMMV).