The time is Post-Edo. Thieves who devoted themselves to committing atrocities did have one feared man whom they referred to as “Oni” or demon. Heizou Hasegawa is known as Oni no Heizou; an Arson & Theft Inspector. Arson & Theft Inspectors are a special part of a police force. They are not simply tasked with cracking down on criminals within and outside of Edo, they are an incredibly mobile organization able to capture criminals in other countries.

However, Heizou is not a stiff man only dedicated to his work. On certain occasions, he has been known to take pity on those who have committed indiscretions. What Heizou cannot forgive, is the unjust. The three principles that thieves live by are:
- Don’t kill
- Don’t rape
- Don’t steal from a store that would go under if you do.
For those who are outside of these conditions and go against the road that is human, there is no pardon. Heizou is a captivating adult overflowing in empathy, chivalry, and resolve while having ambition and appeal surrounding him in the air. To Heizou and the indecent characters that he is surrounded by, he hunts them down, crushingly defeating the unjust running wild in Edo.

Heizou Hasegawa

Voice Actor: Kenyu Horiuchi

Heizou is the head of the Arson & Theft Inspectors. He is referred to as Oni no Heizou because he mercilessly cracks down on criminals. However, those criminals who do follow the three principles of thievery, he does have a sense of open-mindedness, and is overflowing with empathy. Formerly known as “Honsho no tetsu” or Tetsusaburou Hasegawa, he studied the sword with Samanosuke at Takasugi Dojo. Heizou was not the real son of his mother Hatsu, and was often referred to as the ‘son of a mistress’. To escape this harsh treatment he ran away from home and he has done bad things in his past. Heizou does have a penchant for delicious food, alcohol, and he rather loves his smoking pipe. Together he lives with his wife Hisae, his son Tatsuzou, and his daughter Ojun.

Tatsuzou Hasegawa

Voice Actor: Daisuke Namikawa

Heizou’s son. He is at the peak stage of wanting nothing more to play, and has caused Hisae and Heizou many issues. However, he does respect his father Heizou.

Omasa

Voice Actor: Romi Park

Female spy who idolizes Heizou. A former thief, Omasa used to be a member of the Kitsunebi group, however she was saved by Heizou. She now works for Heizou as a spy ever since she was granted that favor.