Oblivion Island Haruka & The Magic Mirror (2009)

Haruka lost her mother at a young age. While her mother was still alive, she received a hand mirror from her. After her mother's death, she forgot about the mirror and eventually lost it. One day, she decides to go to a local shrine and pray for the hand mirror to be returned to her. It is there that she accidentally encounters a small masked creature which she secretly follows to the land of forgotten items.