paragraph: In Japan of the Tokugawa Ieyasu period , a young ninja named Jin Wu wantonly kills samurai and other government officials , leaving his clan to face the blame .  When they start hunting him down , Jin Wu and his wife Akane sail to China both to escape their wrathful kinsmen , and for Jin Wu to complete revenge by finding the last man he holds responsible for his father's death .  That man , Fukuda , leads a peaceful life as a mirror maker under the name of Uncle Foo .  He has a young prot g e , however : Jay , a smug martial artist who constantly tries to prove himself by taking up every opportunity to fight .  Jay also constantly teases his lecherous servant Chee and takes few things very seriously .  However , as he sees his surrogate father attacked , Jay immediately rushes to his aid , but during several clashes he has to find out that he and the ninja are evenly matched .  Eventually , it is revealed that Jin Wu s father was not killed by his clan members ; he had died as a hero in a rebellion instead .  Ashamed of his own cowardice in escaping to China years before following that attempted uprising , Foo makes peace with Jin .  But before their final encounter , Foo took poison to restore his honor by his own death , and he asks Jin to kill him in order to spare him the last agony , Which promptly leads to a misunderstanding between Jay and Jin .  The two battle each other to the top of Jay s family temple and finally settle their differences just in time to face a spiritual boxer , whose son Jay has insulted in the course of the movie . 
question: What does Jin Wu want with Fukuda?
answer: He wants to prove himself to him