From Japan Today:

A 34-year-old man was charged with assault on Wednesday, accused of wiping saliva on a woman’s coat while she was sleeping on a Keihin Tohoku line train.

Police said Nobufumi Kamigaki, a resident of Yokohama City, wiped saliva he had put in his hand on the left shoulder of the 23-year-old woman sitting next to him, at around 7.10 a.m. Wednesday. Train security personnel on board happened to see the incident and escorted the man off the train at Tsurumi station, handing him over to police.

Kamigaki has admitted to wiping saliva on the woman’s clothes and told police he had done it to about 20 women since the end of last year, telling police: “I wanted to make beautiful women dirty.”

I wonder if he's named Gimpei too...