My dear friend, that IS a Studio Ghibili film.The title is "Pom Poko".I guessing that you haven't seen all of the movies yet. The movie is by Isao Takahata. I remember this part well is because this is the part I like from the movie, plus I have all the movies from the collection... I think. I suggest that you watch all the movies from the collection as they are good, especally Spirited Away, Grave Of The Firefly and Howl Moving Castle if you have not done so. Trust me, I have seen all the movies more than once and I should know, Im one of the biggest fan in the world.