The Boy and the Beast

The Boy and the Beast (バケモノの子, Bakemono no Ko) is a 2015 Japanese animated action-adventure fantasy film written and directed by Mamoru Hosoda. It was released on July 11, 2015 and won the Animation of the Year at the 37th Japan Academy Prizes.

Plot
A tale of a boy and a beast: both lonely, both stubborn, and both strong. In the human realm, a nine-year-old Ren just lost his mother in a traffic accident. With his father nowhere to be found, and his extended family being cold and distant, a desperate Ren runs away to the mean streets of Shibuya to try and survive on his own.

In the beast realm of Shibuten, the fierce warrior Kumatetsu is certainly feared, but not especially liked or respected. When the Lord decides to retire and become a God, it would be decided that Kumatetsu and the noble Lord Iouzan to be the successor candidates considered the two being strongest in the land. But Kumatetsu is so anti-social he's never even managed to hold on to a disciple. And until he proves he can, he'll never be a serious contender.

When Ren gets lost in a maze of alleyways and finds himself in the strange land of Shibuten, fate brings these two stubborn and fierce-willed souls together, and Kumatestu re-names the boy "Kyuuta." Each of them has much they can teach the other, but where these two are concerned, nothing is going to be easy. As Kyuuta adjusts to his new home he finds himself torn between two worlds—two worlds that are far less separate than either the Boy or the Beast realizes.