Nobita wants to run away from home, again. He finds out that there is nowhere for him to go. All the land is owned by someone. His friends end up wanting to run away also, even Doraemon. They figure out that the only way to find land that isn't owned by anyone is to go back in time to when no humans existed. They end up helping a prehistoric boy rescue his tribe from Gigazombie.
Nobita no Nippon Tanjou was certainly an enjoyable movie, and a great first impression for a person like myself who has never actually seen Doraemon, despite its overwhelming popularity in Japan. Albeit formulated upon a childish and roundabout plot line, this archetypal setup does not detract from the depth of its amusement and the value of its entertainment.
Opening up with a supposedly recurrent motif--that is, Nobito's tendency to attempt to run away--juxtaposed with the hunting excursions of a confused cavechild about to be sucked into a vortex, the film clearly aims to immediately earn the attention of it's intended audience (children).
The art is colorful
and eye-catching, but not exceptional and clearly old-fashioned. The soundtrack and voice acting is par, but again, not spectacular. The characters are pre-established and not given any sort of development within the span of the movie, but they certainly aren't unlikable, they're just generically comedic and static. While I can't praise the movie for this, I don't find it particularly negative either--for the genre and pure entertainment purpose of the film, the kids fit the bill.
Overall, it's definitely something I enjoyed and would recommend to burn an hour or to entertain a group of bored children, but it's not something I would set aside time to watch again. It's funny, dynamic, and has the chummy, nostalgic vibe that would bring a warm pain to the chest of any adult revisiting it, but for someone watching for the first time, it can seem to drag along at times and serve no real purpose when it comes to intellectual analysis. It's a dated piece of art for dated folk, but otherwise, it's just a film to laugh at and appreciate for its unabashed mediocrity.