If you're looking for manga similar to Tokyo Youhei Kabushikigaisha, you might like these titles.
A century-long war between two nations finally came to a truce. Three years of peace later, there are signs that another war is becoming inevitable. However, there are those certain few who can fight, not with guns, but with powers. What role do they have in all of this?
A mysterious masked and armored man has been showing up in Tokyo, apparently fighting criminals in the name of justice. Satou Yuuki is a kind-hearted high school student who is being brutally bullied by a boy from a powerful family and his friends. Yuuki's rage is buried so deeply inside himself that it becomes another personality, composed only of anger. When the bullies push him too far, that Yuuki comes to the surface, and only the armored stranger keeps him from becoming a murderer. Suzuki Akari is an unattractive girl in the same school, who is treated badly by everyone. At night, though, she makes herself up into a pretty girl and lets out her rage and tremendous strength on gangsters and rapists. The masked man encourages Yuuki and Akari to join him in cleaning up the crime of the city, and to use their strength to fight for justice. The three of them are surely going to have their work cut out for them!
Takeshi Hazama, on the surface is a high school student aiming to be a manga creator, but in truth works as a "Yami Kariudo," a Dark Hunter, an assassin who works on behalf of victims and the bereaved to slay evil. As a Dark Hunter, he wields a stainless steel ruler and pen as his weapons. His constant rival includes fellow Dark Hunter, Kyousuke Garyuu, a Treasure Hunter who is at different times an ally or enemy to Takeshi.