The Japanese government has identified an issue concerning the legality of 'Shiroi Basu' (white buses), and their application under discretionary insurance. These buses, often private vehicles modified to act as minibuses, fall into a grey area between personal and commercial vehicle insurance, creating complications with regulatory compliance. Accidents involving these vehicles could unfold into complex insurance claims. Initiatives are being taken to clarify the insurance status of these vehicles and mitigate risks to passengers and other road users.

In Japan, the use of white buses has been prevalent, especially outside of metropolitan cities, due to their convenience and flexibility. However, due to their nebulous insurance status, the topic has become a significant concern among Japanese citizens - both users and non-users alike. The consensus leans towards a more stringent system that ensures safety and legal protection for all parties involved.

In the US or EU, commercial and private vehicle insurance is distinctly categorized, and any form of transport used for profit must have commercial insurance. A vehicle's mode of use, rather than its type, determines its insurance. However, the scenario with Japan's white buses seem to blur this line resulting in a regulatory challenge.