As soon as the Hojo-Family had been defeated by Toyotomi Hideyoshi, Kotaro organized groups of thieves with his old ninjas comrades and looted all around Kanto. Even after the peaceful Edo period had begun, Kotaro formed groups of bandits, pirates,and burglars and continued this lawless conduct. Although Kotaro and his companions gave the greatest fear to people in Edo, their end was all too soon. Another thief, who used to be a ninja like Kotaro tipped Kotaro off to some public servants. Kotaro was soon arrested and executed. It was a disappointing end for a monster ninja