Snow in Spring

After his mother’s death, Yamamura takes his father to live with him and his family, but the old man’s senility soon gets worse. Continually disrupted by the father’s irrational behavior, the Yamamura family’s life gradually deteriorates. One night, having reached the end of his patience, Yamamura decides to leave his father in the mountains…

(From http://www.imdb.com/title/tt0476692/plotsummary)