 Due to the end of production on Takahata's "Only Yesterday" (1991), Miyazaki initially managed the production of "Porco Rosso" independently.The outbreak of the Yugoslav Wars in 1991 affected Miyazaki, prompting a more sombre tone for the film; Miyazaki would later refer to the film as "foolish", as its mature tones were unsuitable for children.The film featured anti-war themes, which Miyazaki would later revisit.