Task: Question Generation
Input (English): In this fifth 'Lone Wolf and Cub' movie, Ogami is tested by five messengers, each who try to kill him. After defeating all the messengers, Ogami learns he must kill a young girl who was raised as a boy and is intended to be the heir of a local daimyo, while the real heir, a little boy, is kept locked away. In addition to murdering the senile, old lord, his concubine and the girl, Ogami must stop a document revealing the deception from reaching the hands of his mortal enemy, Yagyu Retsudo (whom now wears a back eyepatch over his left eye after loosing it in a duel with Ogami Itto in the previous movie.Meanwhile, Daigoro is again separated from his father and proves his courage and sense of honor as he refuses to admit the guilt of a woman pickpocket he becomes mixed up with.
Output (English): Question: Who is Ogami's mortal enemy?, Answer: Yagyu Retsudo