A Distant Neighborhood

A Distant Neighborhood (遥かな町へ) is a Japanese manga by Jiro Taniguchi. It was adapted into a live-action French-Belgian film in 2010.

Plot
Middle-aged salaryman Hiroshi Nakahara accidentally takes a train ride back to his old hometown to visit his mother's grave. Then, for reasons he cannot explain, Hiroshi is transported over 30 years into the past, reacquainting himself with the family he has since lost and the individual memories he has since forgotten.