Molester's Train: Nasty Behavior (痴漢電車　いやらしい行為, Chikan densha: iyarashii kōi) aka Molester's Train: Dirty Behavior and Birthday (誕生日, Tanjōbi) is a 1993 Japanese pink film directed by Hisayasu Satō under the pseudonym Hisakazu Hata as part of the Molester's Train series. Future director, Shinji Imaoka worked on the project as assistant director, and prolific screenwriter Kyōko Godai wrote the film. It was named the second best pink film release of the year at the annual Pink Grand Prix.