Bujinga is a very specific Japanese art form that evolved in the Kamakura period. Bujin (武人) means warrior and ga (画) is painting. And so the bujinga portraits were depictions of samurai warriors intended to capture the legacy of the brave and pass them on to future generations. In a contemporary iteration, bujinga artist Masayuki Kojo captures characters from Star Wars, creating versions of Darth Vadar and the Storm Troopers like never seen before.
You can read and see more at Spoon & Tamago.