The Neighbor (2011)

One day, drawn to a mysterious song coming from the next-door apartment unit, Shunsuke meets Setsu, an old woman who claims she has been waiting for 400 years to become his wife. Shunsuke sets out to learn the truth about her past and uncovers a bittersweet history of love and loss -- and a map to the treasure long sought after. Japanese language film with English subtitles.