Oyayubi Hime Monogatari
Story of Princess Thumbelina
Thumb Princess Story
Thumbelina: A Magical Story
おやゆび姫物語
A bratty girl named Mia is given a book, Thumbelina, which upon reading she is shrunk and transported into the world of the book. She embarks on a journey to return home, and to normal size making friends and learning lessons on the way, but that's only the beginning of her adventures.
(Source: ANN)