Yasuo Yamada, who voiced Lupin III before his death in 1995, was also the official Japanese dub voice for Clint Eastwood. He also dubbed over Graham Chapman in Monty Python's Japanese dub.
Goro Naya, who voiced Zenigata in the same anime, was the official Japanese dub voice for Charlton Heston. Concidently, he also dubbed over John Cleese in Monty Python's Japanese dub.
Yes, they assign a certain voice actor to a specific character in Japan too. However, I think traditionally Japanese dubs of American live-action movies were done for when the films only played on television and on video. I think the theater releases were always subtitled until pretty recently.