Maybe the subtitles are incorrect then? I was watching Seven Samurai and when Gorobei (Yoshio Inaba's character) introduces himself I'm certain he says: Katayama Gorōbei. Both Wikipedia and imdb list his name as Gorōbei Katayama. This same thing happened in another movie I watched, and in both cases the characters were native Japanese speakers. The name would appear in reverse order and the characters would say them in the "right" order (or vice versa).