Japan's public transportation system is very developed, and subways and trams are the main tools for people's daily commuting. However, this convenience also brings hidden worries, namely the problem of "train perverts" - known in Japanese as "mohan".

The Japanese Cabinet Office conducted a survey among 36,231 young people aged 16 to 29 in February this year. The results showed that about 10.5% of people had encountered infatuated behavior on trains or in public places, and about 9 of the victims were women. 62.8% of people encountered idiots on trams, followed by 13.0% on the road, and most people said they encountered them more than once.

In order to better understand the actual situation of victims, the Japanese Cabinet Office conducted another "actual survey" (the number of valid responses was 2,346 people). The survey results show that the age of the respondents who encountered the behavior of "tram pervert" for the first time was concentrated in "16 to 19 years old" (46.4%) and "under 15 years old" (35.4%).

In 2023, the Japanese police arrested approximately 2,000 people for idiosyncratic behavior. However, about 80% of the victims in the above-mentioned survey did not choose to call the police. The reasons included not wanting to make the matter bigger or not wanting to be late for work or school, or being in a hurry.

In terms of the impact of encountering "train perverts", 17.5% of the respondents said they were "afraid to go out since then," 14.6% said they "often recall the scene when they were victimized," 13.1% said they were "afraid of contact with the opposite sex since then," and 10.5% said they were "physically and mentally unwell."