Kōichi Yamadera
is a 2011 Japanese anime drama film produced by Production I.G and distributed by Kadokawa Pictures. The film was written and directed by Hiroyuki Okiura and stars an ensemble cast featuring Karen Miyama, Yuka, Toshiyuki Nishida, Chō and Kōichi Yamadera. In "A Letter to Momo", 11-year-old Momo Miyaura moves with her mother to a small island town after her father dies. When she arrives, she encounters three goblins that others cannot see who help her to cope with the loss of her father and the changes in her life.