There are several reasons why Japan is often perceived as cleaner than South Korea, despite their similar living standards. Here are a few possible explanations:

1. Cultural differences: Japan has a long tradition of cleanliness and orderliness, which is reflected in their cultural practices and values. For example, it is customary in Japan to remove one’s shoes before entering a home, and this practice extends to many public spaces as well. Additionally, there is a strong emphasis on personal responsibility for cleanliness in Japan, and littering or other forms of public misbehavior are generally frowned upon.
2. Government policies: Japan has implemented a number of policies and programs to encourage cleanliness and waste reduction. For example, there are strict regulations around waste disposal and recycling, and the government provides incentives for businesses and individuals to reduce their waste production. In contrast, South Korea has historically had more lax regulations around waste disposal, and littering has been a common problem in some areas.
3. Infrastructure: Japan has invested heavily in public infrastructure, including waste management facilities and public transportation systems. This has allowed for efficient waste collection and disposal, as well as easy access to public spaces that are well-maintained and clean. While South Korea has made strides in improving its infrastructure in recent years, it may still have some catching up to do in this area.

It’s worth noting that perceptions of cleanliness are subjective and can vary depending on individual experiences and preferences. However, these factors may help explain why Japan is often viewed as a cleaner country than South Korea.