Basilisk

During the Edo period, Shogun Tokugawa Ieyasu, after consulting the priest Nankōbō Tenkai, decided that whichever of his two sons would succeed him would be chosen by the outcome of a confrontation between two legendary ninja clans: the Kōga and the Iga.

These two clans, enemies for 400 years, had maintained a non-aggression pact for several generations, decreed by Hattori Hanzo's ancestor. Under pressure from the shogun, the latter authorized the two clans to resume their conflict: each clan would have to appoint 10 masters...

Basilisk is Japan's answer to Romeo and Juliet — except everyone around them has extraordinary abilities, a political machine is using them as weapons, and there is no version of this story where love wins cleanly.