Several hundred costumes were all created by hand, a process that took two years.
The castle destroyed in the middle of the movie was specially constructed on the slopes of Mount Fuji for the film and then burned down. No miniatures were used for that segment, although an optical of another castle being burned at the end was used.
Akira Kurosawa referred to his previous film, Kagemusha, as a "dress rehearsal" for this film. He spent ten years storyboarding every shot in the film as paintings. The resulting collection of images was published with the screenplay.
Akira Kurosawa's eyesight had deteriorated almost completely by the time principal photography began. He could only frame shots with the help of assistants, who used his storyboard paintings as guidelines.
Akira Kurosawa's wife of 39 years, Yôko Yaguchi, died during the production of this film. Kurosawa halted filming for just one day to mourn before resuming work on the picture.
A scene which required an entire field to be sprayed gold was filmed but left out of the final film during editing.
The film used approximately 1400 extras (1400 suits of armor were fabricated, designed by Akira Kurosawa) and 200 horses. A number of the horses had to be imported from the United States. Kurosawa used the extras and horses so efficiently that when the film was ready for premiere, newspapers in Japan were reporting that thousands of extras and horses were used to stage the battles.