Oscar-winning director Hayao Miyazaki, who has come out of retirement, is working on an animated feature film titled "Kimitachi wa Do Ikiru ka," ("How Do You Live?"), according to Studio Ghibli sources.

The title is the same as a 1937 book by Genzaburo Yoshino, an editor and writer of children's literature, according to the sources. They said the book will have significant meaning for the main character in the film, which is expected to take three to four years to complete.

The book depicts the psychological growth of a teenage boy through interactions with his friends and uncle.

Citing concentration problems because of his age, Miyazaki announced in September 2013 as he was promoting his film "Kaze Tachinu" ("The Wind Rises") that he was retiring. But he came back last February, and now at age 76 is working on the new feature film.

Miyazaki's "Sen to Chihiro no Kamikakushi" ("Spirited Away") won the Berlin International Film Festival Golden Bear award in 2002 and the Academy Award for best animated feature film in 2003.

His other major works include "Tonari no Totoro" ("My Neighbor Totoro") in 1988 and "Mononoke-hime" ("Princess Mononoke") in 1997.