Otto Chikan!

"Otto Chikan!" (おっとCHIKAN!) is the 4th single by the Japanese idol girl group Onyanko Club. It was released in Japan on April 21, 1986.

Outline
This song praises the high school girl bullying a nerdy-looking man by accusing him of being a molester when the man truly wanted to give the girl a love letter.

The song was banned from being commercially used on television sometime after its release.

The lyrics are considered extremely offensive in light of the 21st century, where molestation crimes have been severely punished and false accusations of molestation have also become a problem. On the other hand, at the time this was released, music critic Kyōko Sugimura (杉村京子) commented as follows. "The content depicted in the lyrics can be forgiven because it is a cute bullying by a high school girl. This is a mischievous song".