Kota Yui

A feudal epic presenting the tale of a petty thief who is recruited to impersonate Shingen, an aging warlord, in order to avoid attacks by competing clans. The impostor becomes comfortable living his life among nobility, but his responsibilities to his station grow more demanding the longer he occupies it.

Documentary made by Toho for the Masterworks reissue of all of its Kurosawa films. This one focuses on "Kagemusha" (1980).