Japan's Warring States Period was a time of great turmoil and hardship for the people. The emperor was just a puppet of a powerful daimyo, a puppet with no real power. In order to "hold the emperor's hand over the princes", each daimyo used their own "country" as a base to exchange scheming, financial resources, and military strength with other daimyo, hoping that when the heroes "competed in the Central Plains", they could defeat other opponents in one fell swoop and go to Kyoto to assist the emperor.
Shinrokuro is not a tycoon, but he has a strong character. For the revenge of his lord, he can serve Young Master Proton in order to avenge him in the heart of the enemy. He could swallow his anger, surrender to others, until he saw his enemy walking out of that person's home, and he knew that his balance was broken...