What if you found an unmarked envelope full of money in your mailbox? Would you keep it?
On March 20 and 21, exactly 30 households were faced with this very dilemma as an unknown person deposited a total of 760,000 yen (US$7,420) in the mailboxes of an apartment complex in Ikoma City, Nara Prefecture. The largest sum found in a single mailbox was 137,000 yen (US$1,339). Just 10 days earlier, mysterious envelopes were deposited at an additional 30 homes in Kawasaki City, 486 km (300 mi) away. This time, the envelopes contained gift certificates with monetary values ranging from 5,000 yen (US$48) to tens of thousands of yen (hundreds of US dollars).
If this sounds like easy money to you, you might be surprised to learn what half of the residents chose to do with the cash.