It seems that during the seventies and eighties, practically every Western fairy tale (particularly those from Hans Cristian Andersen) were ultimately made into an animated movie by the Japanese - and Thumbelina is no exception.
A very light and carefree adaptation of the classic tale, this movie is aimed at a very young audience, where there is almost no real conflict and eventually everyone lives happily ever after. The story is a bit rambling, the artwork and artwork are serviceable, about the only thing that is really notable about this production are the Osamu Tezuka character designs. Not a bad movie, but unless you are under the age of six it is unlikely you'll be particularly enchanted.