My Second Brother (1959)

Being a faithful 'company man', Yoshikawa moves steadily ahead within the Toho corporation. But Kaji, his old friend, makes his way through the dark side of the social world, working for a power broker who is plotting to take over Toho. Yoshikawa is given an order to investigate the company's information leakage that is seriously devaluing its stock price. In the course of the investigation, he happens to reunite with Kaji, and notices that his beloved Akiko, the only daughter of Toho's president, as well as a major share holder of the company, is in love with Kaji. For Yoshikawa, who is counting on a marriage with her that would secure his career and wealth, Kaji turns out to be an obstacle on his future path.