Sakura

Sakura is a 2013 Studio Ghibli film directed by Isao Takahata.

Plot
Sakura is a young girl who one day finds a small opening in a cherry blossom tree and crawls in. She follows a staircase down into an underground home where a small family of pink people reside. They are pink with fluffy hair and use the cherry blossoms from the tree as clothing. They state they are called the cherry blossom people and were created when the guardian of the forest created the first cherry blossom tree. All over the world these small people multiplied but started to die out after their blossoms were used to make tea.

The mayor of the city has made plans to destroy the whole forest to build a new Mega Store so Sakura and the guardian of the forest try to stop the construction.