The Obi-Wan That Never Was | Pop Recultured 

Probably Hiroyuki Sanada he’s a well known enough Japanese actor Hell he’s done Hollywood movies and TV Last Samurai, that really insulting Hollywood version of the 47 ronin (Japanese people felt really insulted by that film) and Westworld

Toshiro Mifune plainly refused the role , he thought it would have cheapened the Samouraï Ethics and code to appear in a Sci Fi movie.

I don’t mean to sound harsh, but he simply didn’t want to. He thought that doing such a film would be reductive towards the original culture. After all, his generation often were the children of the last generation of samurai/bushi. The remnants of it was still ingrained in family culture in those days…it was lived, not simply portrayed on film. The legacy of which isn’t always easy to process for people even now (primogeniture family culture, etc), particularly in post-war Japanese society. Why would he give his voice to Hollywood for a secondary representation and an untested science fiction franchise, when Japan had its own film industry and could represent it at its source? Samurai were not fictional characters after all, and during the war, a lot of historical sites, artifacts, and castles were destroyed. Even before that by Japanese themselves, through local uprisings. Not surprising to be protective of that, and not to be made into just another “ethnic” trope.

It’s because in Star Wars, the universal spoken language is English