Kakushi-toride no san-akunin (Akira Kurosawa) in Star Wars movie

C-3PO and R2-D2 are derived from the characters of Matakishi and Taihei, two farmers/ne'er-do-wells Mifune's character, a samurai general, conscripted to help ferry his princess out of enemy territory. Two characters in the Japanese film were split to produce four in "Star Wars": aspects of Toshirô Mifune's samurai character became Ben Kenobi and Han Solo; and aspects of the Princess's character became Luke and Leia.