The most important point is to recupe its production cost from its film rentals, or be selected by the ideal business strategy. I wonder if all movies booking can be considered by above issues. If business is not successful, there is no chance next time for talented persons. To recupe the production cost by film rentals is the basic structure for all movies. However, I feel that most Japanese producers put mainly priority on the former one and tend to neglect the latter one.
Someone says that to complete one movie requires an enormous amount of power and enegy.
It is the main stream in Japan that distributing a movie should be done by professionals in the field. However, the producer is responsible for whatever the result. To make a movie needs much money, sometimes it needs millions of yen. It is the same as to establish a company. A producer is like COO at a company.