Was in Japan in February and took a couple of internal flights as well as those in/out - baggage retrieval sticker was checked against the baggage tag each time. Took a few seconds.
The problem, isn't restricted to hold baggage, either. I once had my handbag lifted from the end of the conveyor-belt outbound, after it had been through the scanner. I ran after the woman who'd picked it up and she apologised and handed it back. However, I noted that she then kept walking and didn't go back to find her own.