In South Korea, there's a rising trend of using various methods to identify and track individuals with alleged pro-Japanese sentiments, referred to as the 'Pro-Japan Faction Scanners'. While it's not clear when and how these measures are being deployed, the controversy surrounding it is escalating, stirring fresh debates in the society about privacy and historical tensions between Japan and South Korea.

This issue is being closely followed in Japan as well, where the citizens are concerned about how it affects the Japanese living in South Korea and the relations between the two nations. Furthermore, it's being questioned in terms of privacy rights and how it might affect future societal norms, considering the historical animosity between both countries.

In contrast to the US or EU, where privacy protection laws are stringent and surveillance is a contentious issue, this practice has sparked equally fervid controversies. Typically, in the US or EU, such practices would undergo rigorous screenings and debates before implementation for concerns about potential privacy infringements.