A controversy has arisen in Japan over the legality of seat blocking on high-speed buses. There is an emerging dispute, as an increasing number of passengers are finding ways to block seats next to them from being used, leading to discussions on whether this practice is legally enforceable or not. The issue has raised questions on the limits of personal space vs public convenience, and it sprouts debate amongst transportation authorities, legal experts, and daily commuters.

Seat blocking in public transportation is not considered socially acceptable in Japan. The practice disrupts the country's well-regulated public transportation system and creates discomfort for commuters who value the efficient use of public space. Furthermore, Japanese law is seen to possibly uphold perceived social etiquette, echoing a broader social value of cooperative behaviour and spatial awareness in public spaces.

In the US or EU, issues regarding personal space on public transport are often handled on a case-by-case basis, relying on the discretion of transport operators rather than legal enforcement. Consequently, while seat hogging is generally frowned upon, it is rarely a legal matter unless it amounts to harassment or discrimination. This reflects the differentiated approach towards public space and personal freedom in these regions.