Letztes Jahr wurden in Tokio über vier Milliarden Yen an verlorenem Bargeld gefunden, was einen neuen Rekord darstellt

I want to know specifically where the money goes when it isn’t returned and what specific public services it is legally allowed to be used for. Lost money is, first, the property of the original owner; second, the property of the person who found it; and third, the property of the people. I don’t want certain government offices or police stations to claim it as their own.