FATHER: Failure? Or Success?

"Father" is the story of an American business man who works to make a living in Japan for himself, his Japanese wife and his two children.  It is a story of loyalty and betrayal, success and failure.  His own weaknesses contribute to his problems as does the Japanese culture.  We are left finally with the question, "ultimately, is he a success or a failure?"  What actually is success?  What is failure?