What actors and actresses appeared in Mesu inu - 1951?

You're likely referring to the 1951 Japanese film "Mizu no Inu" (Water Dog) which translates to "Mesu Inu" in English. However, there is no widely available information on the cast for this film. It's possible that the film has not been fully documented or the records are lost to time.

If you have any additional details about the film, like the director or a specific scene, it might be easier to find cast information.