Steven Spielberg and Toshirō Mifune on the set of 1941 (1979)
“‘Here’s my chance to work with the greatest samurai of them all, Toshiro Mifune,’I said. He came into my house when we first met. He walked in wearing a business suit, with his thinning hair and great big smile, with very little english to his credit, but he had a wonderful interpreter with him. He opened up the book and he said, ‘Now here is where the script is wrong’. Our submarine was wrong, according to Toshiro, and we made corrections. So in that sense, Toshiro cleaned up the Japanese act and made them professional and worthy of our great fear and respect” with him even having the Japanese extras running drills on the set, during lulls in filming.
— Steven Spielberg