Suspect said, 'I wanted to tough the woman's body'
Driver of the train and commuters at Keikyu-Taura Station saw the boy jump in front of the train
In graphic footage posted on social media, a second man is shown stomping on the head of the victim
During the attack, the woman resisted the advances of the suspect and screamed, causing him to flee the scene
According to witnesses, several men, possibly foreign, got into a fight on the boardwalk of the Dotonbori canal
Man was later accepted at a hospital about 50 kilometers away about 8 hours later
Suspect denies the allegations, police said
Suspect said, 'I thought that if I made money, I could visit more sex shops'
Vehicle is registered in Fukushima
Suspect was apprehended at Haneda Airport on July 27