There appears to be an increasing trend of customers forgetting their credit cards at restaurants after dining, especially those who lack cash. The trend, highly prevalent in Japan, sees clients leaving their credit cards as a form of collateral, but then failing to return to pick them up. This leaves businesses at a loss as they deal with the inconvenience posed by this reckless consumer behavior.

In Japan, this trend is growing to become a societal issue as it negatively affects restaurant and bar owners. It reflects poorly on the level of financial responsibility from the consumers' side. Social values of respect and responsibility are integral in the Japanese society, and this trend goes against these values.

This issue doesn't seem as prevalent in either the US or EU, perhaps due to more widespread use of cashless transactions or certain policies in place that encourage customers to take greater financial responsibility. The situation in Japan could possibly suggest a need for stricter policies or a more rigorous education about financial responsibility.