Strangers by Taichi Yamada

Chosen by Sue.

Also a film with Andrew Scott called All of Us Strangers.

Middle-aged, jaded and divorced, TV scriptwriter Harada returns one night to the dilapidated downtown district of Tokyo where he grew up. There, at the theatre, he meets a likable man who looks exactly like his long-dead father. And so begins Harada's ordeal, as he's thrust into a reality where his parents appear to be alive at the exact age they had been when they had died so many years before.