The poster reads:
“Spitting on staff is a crime. Malicious nuisances will be severely punished. This absolutely must stop. Anyone who witnesses it, please notify station staff or police.”
"I have never heard of a Japanese person doing this. I have although seen a foreigner do it before, an overweight American white guy. He spat in the face of a conductor on the train, on the way to Narita Airport. He was pissed cause there was some train delay outside of the conductors control. I'll never forget how relovted I felt. The foreigner's wife was Japanese too. She must have been mortified. I sure hope that conductor contacted the police to meet that asshole at the Narita translation.