The Anime Lad
Joe Higan escaped a secret ninja organization and built a secluded life in rural America. His former associates eventually locate him. Their arrival forces Joe to confront the training and identity he tried to leave behind. The clan has preserved its old code while adopting modern tools for enforcement.
Gigguku
Joe has arranged an ordinary life as far from his former clan as he can manage. Then masked fighters tear through that illusion. The immediate appeal is the collision between disciplined close combat and a modern organization with far more than swords at its disposal. The quiet setting makes the intrusion feel vicious.
Father's Basement
Secret clans and reluctant fighters are established action material, so the premise alone offers few surprises. The modern setting helps. Joe's traditional training must contend with an organization using contemporary resources, while his rural hiding place gives the opening conflict a grounded scale. The opening works without requiring extra lore.