Uh actually there’s some computer in this. Ashitaka’s arm worms are computer,
[i]Princess Mononoke is mostly hand-drawn, but incorporates some use of computer animation.[8]
When released, Mononoke was the most expensive Japanese anime ever made[citation needed], with production of the film cost ¥2.4 billion (approximately US$20 million)[9] [10] [11]. Miyazaki personally checked each of the 144,000 cels in the film,[12] and is estimated to have redrawn parts of 80,000 of them.[13]
Computer animation was used during 5 minutes of footage throughout the film, and a further 10 minutes used digital paint, a technique which is used throughout all subsequent Studio Ghibli films. The computer animated parts are designed to blend in and support the traditional animation, and are mainly used in images consisting of a mixture of CGI and traditional drawing.
This is the only anime directed by Hayao Miyazaki that does not feature a flying sequence, his well-known trademark.[/i]