Japanese artist Hajime Isayama's Attack on Titan series of graphic novels has made him a global best-seller and a cult figure.

His dystopian vision of man-eating giants stalking humanity has now been made into a big-budget live action film.

In an exclusive interview with the BBC, the reclusive artist revealed his inspiration, and how he nearly gave up after publishers told him he was not good enough.

Attack on Titan: a reclusive artist and his man-eating giants

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Film footage courtesy of Hajime Isayama, Kodansha/Attack on Titan Production Committee