A grand-scale adventure as only Akira Kurosawa could make one, “The Hidden Fortress” stars the inimitable Toshiro Mifune as a general charged with guarding his defeated clan’s princess (a fierce Misa Uehara) as the two smuggle royal treasure across hostile territory. Accompanying them are a pair of bumbling, conniving peasants who may or may not be their friends. This rip-roaring ride is among the director’s most beloved films and was a primary influence on George Lucas’s “Star Wars.” “The Hidden Fortress” delivers Kurosawa’s trademark deft blend of wry humor, breathtaking action and compassionate humanity.