The third installment of the Emperor series, starring Tatsuo Umemiya as the man who rules the night world. Hiroshi rose through the ranks in Tokyo by fighting with women. However, when he returned to his hometown in Kyushu for his father's memorial service, his gambling partner Masa not only confiscated Hiroshi's store and bankbook, but was also saddled with debts in Hiroshi's name. Although Hiroshi was angry, he made a decision and decided to start over using his body. Starting with a female designer, he battles an antique art dealer, Master Nagauta, a female doctor, and many others, and finally battles a rich man's widow.
Fresh out of jail, a smart-mouth wise guy Goro takes the name “Big Brother Katsumata.” Not fitting in well with established gangs, he forms a rag-tag gang called “the Shinjuku Brothers.” The members of their gang are thugs who only wish they were traditional yakuza. When they turn up at the funeral for a gangster, they are not welcomed, but a senior boss intervenes to keep things calm. The boss of bosses invites them to join a respected local council of warlords. Katsumata is suspicious of why such powerful men would extend an invitation to lowlife like himself.
A greedy developer, in league with a corrupt Shrine Magistrate, brutally tries to drive people out of a tenement building and destroy the shrine in back. But he makes the fatal mistake of hosting a 100 Ghost Stories ceremony without the closing cleansing ritual, opening the door for the Yokai Monsters to punish the wicked.
Adapted from Sanpei Shirato's classic manga, a legend unfolds as Watari, a young boy skilled in ninjutsu, takes on the corruption inside the Iga clan and avenges many unjustly killed ninja by the acts of Sandayu Momochi's scheming vice-leader.