Doraemon: Obaachan no Omoide
English title: Doraemon: A Grandmother's Recollections
Japanese title: ドラえもん おばあちゃんの思い出
Type: Movie
Episodes: 1
Source: Unknown
Genres: Award Winning, Comedy, Fantasy, Sci-Fi
Studios: Shin-Ei Animation
Duration: 27 min
Rating: PG - Children

Nobita misses his granny that died a few years ago, so Doraemon takes Nobita to the past to see his grandmother one more time. But they face through a lot of things such as the younger selves of Nobita and his friends, and young Nobita's mother that doesn't recognize Nobita or Doraemon.

(Source: Wikipedia)