The following is a true story. Really, it is... I promise!
In 1996, the Coen Brothers film 'Fargo' was released. Several years later an urban myth developed of a Japanese woman who believed the opening credits of that film which stated it was a true story. It isn't a true story at all but the myth alleges the Japanese woman searched for the money that was buried by one of Fargo's main characters. This film is inspired by that story, which, as it turns out, is as untrue as Fargo is.
And so on to this film, a beautifully crafted tale, at once sad and hopeful. Forget the abbreviated backstory above, its best to enjoy this film on its own merits and treat it as the fiction it is.