Molester's Train: One Shot on the Train (1985)

The boss of the Yamauchi gang was assassinated by the Takeda-kai, so they asked a secret organization to eliminate Chairman Takeda and continue the conflict. Joke Togo, a hitman who received the request, targets Chairman Takeda, but Takeda, fearing being targeted, takes his bodyguard Akiko with him when going out by train, and the lecherous Takeda enjoys molesting Akiko on the train...