Francisco in July 1978 to discuss the project Kurosawa considered most financially viable: Kagemusha, the epic story of a thief hired as the double of a medieval Japanese lord of a great clan. Lucas, enthralled by the screenplay and Kurosawa's illustrations, leveraged his influence over 20th Century Fox to coerce the studio that had fired Kurosawa just ten years earlier to produce Kagemusha, then recruited fellow fan Francis Ford Coppola as co-producer. Production began the following April, with Kurosawa in high spirits. Shooting lasted from June 1979 through March 1980 and was plagued with problems, not the least of which was the firing of the original lead actor, Shintaro Katsu—creator of the very popular Zatoichi character—due to an incident in which the actor insisted, against the director's wishes, on videotaping his own performance. (He was replaced by Tatsuya Nakadai, in his first of two consecutive leading roles in a Kurosawa movie.) The film was completed only a few weeks behind schedule and opened in Tokyo in April 1980. It quickly became a massive hit in Japan. The film was also a critical and box office success abroad, winning the coveted Palme d'Or at the 1980 Cannes Film Festival in May, though some critics, then and now, have faulted the film for its alleged coldness. Kurosawa spent much of the rest of the year in Europe and America promoting Kagemusha, collecting awards and accolades, and exhibiting as art the drawings he had made to serve as storyboards for the film. The international success of Kagemusha allowed Kurosawa to proceed with his next project, Ran, another epic in a similar vein. The script, partly based on William Shakespeare's King Lear, depicted a ruthless, bloodthirsty daimyō (warlord), played by Tatsuya Nakadai, who, after foolishly banishing his one loyal son, surrenders his kingdom to his other two sons, who then betray him, thus plunging the entire kingdom into war. As Japanese studios still felt wary about producing another film that would rank among the most expensive ever made in the country, international help was again needed. This time it came from French producer Serge Silberman, who had produced Luis Buñuel's final movies. Filming did not begin until December 1983 and lasted more than a year. In January 1985, production of Ran was halted as Kurosawa's 64-year-old wife Yōko fell ill. She died on February 1. Kurosawa returned to finish his film and Ran premiered