Toshiro Mifune Kills Indians

Let's just get this out of the way: the most obvious drawback of the movie Red Sun is that Toshiro Mifune's voice is dubbed when he speaks English. I've heard it was one of his greatest regrets that he was never allowed to use his voice for his English lines in his movies, and that makes me doubly sad. Mifune's voice is inimitable, resonating and powerful, and any voice they choose for him doesn't do the great actor justice. I really wish there was a version with his original voice, but I'm afraid I'm not so lucky.

That being said, Red Sun is a Western with Toshiro Mifune in it. In one movie, he adds Indians, banditos, and cowboys to The List of Things Killed by Toshiro Mifune. While his voice might not be his own (save when he speaks Japanese), his powerful screen presence commands this movie, and that alone is worth the almost two hours of runtime.

It's by no means a perfect movie, and so I'll anticipate some of the complaints you might have, and answer them all accordingly.

You: It's a hackneyed Western plot with stock characters and situations.
Me: It's Toshiro Mifune in a Western.

You: The writers clearly had only a cursory knowledge of Japanese culture.
Me: Toshiro Mifune plays a samurai badass.

You: Although the plot initially balances Charles Bronson's character with Toshiro Mifune's, the middle of the movie is heavily geared toward Bronson's character, and Mifune becomes something of a sidekick.
Me: Toshiro Mifune is no man's sidekick, least of all Charles Bronson's. He badasses his way right into the spotlight, whether the director wanted him to or not. Even when he's not speaking or doing much of anything, he's BEING TOSHIRO MIFUNE.

You: The supporting cast, particularly Ursula Andres as a whore who can't keep her shirt on, is disappointing.
Me: You'd be disappointing, too, if you were standing next to Toshiro Mifune.

You: The plots and conflicts are so contrived they practically groan for you.
Me: HAVE YOU HEARD NOTHING I'VE SAID? IT'S TOSHIRO M.F.ING MIFUNE IN A WESTERN!!!

Also, Charles Bronson's character is actually pretty likeable.