Kurosawa's three next movies after "Seven Samurai" had not managed to capture Japanese audiences in the way that that film had. The mood of the director's work had been growing increasingly pessimistic and dark, with the possibility of redemption through personal responsibility now very much questioned, particularly in "Throne of Blood" and "The Lower Depths". He recognized this, and deliberately aimed for a more light-hearted and entertaining film for his next production, while switching to the new widescreen format that had been gaining popularity in Japan. The resulting film, "The Hidden Fortress", is an action-adventure comedy-drama about a medieval princess, her loyal general and two peasants who all need to travel through enemy lines in order to reach their home region. Released in December 1958, "The Hidden Fortress" became an enormous box office success in Japan and was warmly received by critics both in Japan and abroad. Today, the film is considered one of Kurosawa's most lightweight efforts, though it remains popular, not least because it is one of several major influences on George Lucas's 1977 space opera, "Star Wars".