Kyōiku mama 教育ママ a phenomenon that in Japan has increasingly taken on the appearance of a plague. Imbued with pride, expectation, inconvenience (which often lead to self-harm or suicide) and even worse envy.
The term Kyōiku mama means a mother who force her child to intense study sections in an overwhelming way, without giving to him/her time for anything else and without allowing him/her to do anything else. This is to the detriment of the social and physical development of the child who also suffers from an emotional point of view, reaching extreme cases of self-closure or even worse in self-harm and suicide.

 One of Japan's "plagues" is child prostitution which sees men (but also women) pay for an "appointment" (which almost always ends with a sexual performance) usually with a younger girl or boy. This phenomenon is called Enjo kōsai 援助 交際.
The phenomenon of Enjo kōsai, translated literally means subsidized appointment, sees its intensification towards the nineties of the previous century.

 Chuunibyou, better known as Middle School 2nd Year Syndrome, is a psychological state that takes some guys by keeping them anchored in fantasies derived from manga, novel, or anime. In practice they believe that they have special powers, become part of combat guilds, be part of a great magical design or events that recall fantasy or dark fantasy elements. 

Chikan 痴 漢 it is a black spot that does not spare even children. They are those molesters, in most cases that kind you found on train and subway, that you hear often in the news from Japan.
In the past few weeks in Japan a video has become viral in which 2 high school girls chasing a salaryman for the station platform shouting "nigeru na!"  (means don't run away) and chikan from one of the girls had been molested on the train by this man (the girl in the process of denouncing claims say he touched her breast) and, unfortunately, rarer than common, she found the courage to take it back and follow it.