@Kaduufrrj What a coincidence, my country does that too!
But it is true that japan works this way. I had a bank teller chase me down 3 blocks to give me 5 yen (~5 USD) that was left in the atm. I had extracted 100$, and had it all with me. Definitely not mine, but I took it anyways and thanked the nice man for bringing it to me. He feels good, I am paid for my corruption, win-win.
More fun stories, the teachers would stop me in the hall and zip up my backpack if it was not zipped all the way, warning me that it had "came unzipped"afraid things might fall out. (I just never zipped it, but decided to just thank them and stay quite about that). Put lost items up high. etc.
I can say that nothing was ever stolen from me in japan. That said, I have had family and neighbors steal from me in America.
Now remember this thing about lost items being up high the next time you read a manga with bullying in it. New question arises. Did they hide the shoes on top, or did they take them out of the box and throw them on the ground, and some nice person put them on top?