Seven Days of a Daddy and a Daughter (2007)
This home comedy tells the story of Kyoichiro and his teenage daughter Koume. One day, the two ride a train together after visiting Kyoichiro's mother-in-law. He sees it as a chance to get to know his daughter better, but he ends up getting more than that - by some mysterious force, both Kyoichiro and Koume end up with their mind in the other's body! Unfortunately, they have no choice but to swap lives, pretending to be each other at school and work.
Some information and/or images in this header may be provided either partially or in full from The Movie Database.