A Sword Versus Retsudou! A Father's Love for Daigoro

Lone Wolf and Cub – Season 1

Yagyu retsudo had placed people called "Kusa" in various places. "Kusa" were spies who infiltrated the territory, took root as local people, and continued to lead a steady, normal life while investigating the inner workings of the clan in great detail. This job was hereditary and sadly passed down from father to son.