What actors and actresses appeared in Watashi wa kai ni naritai - 1959?

It seems you're asking about the film "Watashi wa kai ni naritai" (I Want to Be a Shell). However, there is no known film or movie with this exact title.

It's possible that you are misremembering the title, or it might be a less known film. To help me find the correct title, could you provide any additional details about the movie? For example:

* Year of release: You mentioned 1959, but was it around that time?

* Genre: What kind of movie was it? (Drama, comedy, etc.)

* Plot details: Do you remember any specific scenes or characters from the movie?

* Any other clues: Are there any specific actors you remember?

With more information, I might be able to identify the film you're looking for and find its cast.