In Japan, cutting someone in line is generally considered rude and impolite behavior. Queueing and waiting in line are taken seriously in Japanese culture, and people typically expect others to adhere to this social norm. Cutting in line can be seen as disrespectful to others who have been waiting patiently and can cause discomfort or annoyance.
While speaking up for yourself and politely asking the person to go to the back of the line might not be considered rude per se, the way you communicate your request is crucial. In Japanese culture, maintaining harmony and avoiding confrontation is highly valued. If you decide to speak up, it's important to do so with a calm and polite demeanor. Raising your voice, using aggressive language, or being confrontational would likely be seen as impolite.
In many cases, Japanese people might refrain from directly confronting someone who cuts in line and may instead rely on indirect methods to address the issue. For example, they might communicate their disapproval through body language or by discussing the situation with friends or family members nearby.
When in Japan, it's best to follow local customs and queueing norms, as this demonstrates respect for the culture and the people around you. Patience and consideration for others are valued traits in Japanese society, and adhering to these principles will contribute to positive interactions and experiences while in the country.