Ganjirô Nakamura I

During the 1200's, legendary Buddhist monk Nichiren returns from his studies to lead Japan out of moral crisis and prepare to fight Mongol invaders by creating a new form of Buddhism. He runs afoul of the existing Buddhist sects and their government supporters and is persecuted. Can Nichiren persevere before the Mongol fleet reaches Japanese shores?

Sentaro (Raizo Ichikawa) from Ipponmatsu sets out to commit evil and gain dignity, but his good-natured nature does not allow him to do anything bad. Along the way, Sentaro saves a young woman named Okimi (Yuko Miki) from a bad womanizer and meets a Yakuza named Katsugoro (Yoshie Mizutani). He then visits Katsugoro boss Kanjiro Inariyama (Ganjiro Nakamura II) to train to be a yakuza, but to his surprise discovers that Katsugoro is Kanjiro's only daughter, Okatsu. He also finds out that the young yakuza working in Kanjiro's house is his younger brother Hanji (Yukio Hashi). Then the Shigezo family, who had been annoying Kanjiro for a long time, set fire to his gambling hall!