The Human Calculator: Why Do Japanese People Intentionally Overpay in Cash?
The Cash Register Confusion If you work as a cashier in Los Angeles, you expect customers to pay the exact amount or simply hand you a large bill and wait for their change. But if you watch a Japanese customer pay at a convenience store, you might witness a mathematical transaction that completely breaks a Westerner’s brain. Imagine the total bill is 680 yen. The customer hands the cashier a 1,000 yen bill. This makes sense. But suddenly, the customer digs into their pocket and adds a 100-yen coin and an 80-yen coin to the tray, handing over a total…





































