Worst - 'Basilisk' (2005)
The anime film is based on a story taking place in 1614. Two ninja clans -- Tsubagakure of the Iga and Manjidani of Kouga -- are at odds over which grandson is to become the next leader. A battle is set up between 10 elite ninjas from each clan. While all of this is going on, two members of the clans fall in love in a Romeo and Juliet fashion.