As avpsychology professor at Nihon University, Yokota analyzed box-office animations from a psychology perspective. He interpreted films like Your Name, In This Corner of the World, and Frozen, as well as intricate situations in the Forest of Labyrinth in The Great Adventure of Horus, Prince of the Sun, by the late Isao Takahata.
This reference develops the theory of the “emotional valley,” which holds that the main character in an anime tumbles into the world of unconsciousness after intense feelings. Then, the protagonist meets someone who will render aid and who has entered this unconscious world from outside. Finally, there will be an awakening and the main character will develop into a greater personality.