This isn't a manga-monster movie. It's more like a heart-of-gold Disney tale which deals with the heartache of teenage development, illustrated with a clever sci-fi spin which allows the heroine to hop backwards in time. This means she can try to correct those horribly embarassing moments of adolescent life -- which sounds ideal, but...
...every action has a consequence, and light-hearted mucking around with the time-stream to score well in a school test, or to stay out late at the karaokee club morphs into a real threat towards her best friends' well-being, her own life, and the happiness of them all.
The Girl Who Leapt Through Time is beautifully animated and cleverly plotted so you're not quite sure what the outcome will be. It leaps from 'frothy' to 'meaningful' very smoothly and avoids all the slushy sentimentality of Hollywood cartoons.
However the first third is quite slowly paced and it nearly lost my attention -- there was a lot of set up with the characters and background which dragged on for me. Once it hits half way however the film romps off and kept us guessing then right to the bittersweet end.
An ideal movie for anyone in their teenage years who's dealing with friendships that evolve into something more, and who maybe wishes they could have 'that moment' all over again to get it right next time! Charming viewing also for us older folk who want to re-live those moments, and remember how it feels for time to pass at a very different pace to the way it does in adult life.