Hell in the Pacific... Lee Marvin is great, can't remember the other guys name.
Toshiro Mifune.
The Japanese soldier was played by Toshiro Mifune, probably the most recognizable face in all of Japanese film. He played the "crazy" samurai in "The Seven Samurai", which the "Magnificent Seven" was a western re-make of.
Speaking of which, as long as you can include wars where the main weapons were swords and spears, "The Seven Samurai" should probably be on the best-of list.
Try this site out. You can search by MOVIE/ACTOR/DIRECTOR, etc. http://www.imdb.com/