The news explores an issue with annual-fee-free credit cards in Japan. It notes that a significant number of consumers are leaving these cards idle, which leads to unforeseeable costs. This practice imposes a substantial burden on both the credit card companies, in terms of operating costs, and on the consumers as they are unknowingly incurring hidden fees and interests.

In Japan, it's common for people to have multiple credit cards due to their varied benefits. However, the practice of leaving unused cards idle is a concern due to its unexpected costs. Many Japanese people care about this issue as it directly impacts their personal finance and economy.

In contrast, in the U.S. or the EU, there is a stronger culture of financial awareness and user responsibility. Consumers are more informed about the terms and conditions tied to their credit cards, including the implications of having them idle. Consequently, such issues are less common.