Shogun Assassin

When the wife of the Shogun's Decapitator is murdered and he is ordered to commit suicide by the paranoid Shogun, he and his four-year-old son escape and become assassins for hire, embarking on a journey of blood and violent death.

Shogun Assassin is a 1980 adventure action movie, starring Tomisaburô Wakayama, Kayo Matsuo, Shôgen Nitta. It holds an IMDb rating of 7.3/10 from 12,045 votes and runs 1h 25m.