Some more details on Kabaneri:
While the Industrial Revolution was going to mark the change between the modern and contemporary times in the world, an immortal monster suddenly appeared. Unless you destroy its heart that is covered up by a steel membrane, it won't perish. It is also said that when a person bitten by the monster die, the person will revive and attack his own kind. Known as Corpses (kabane), their number has been increased explosively, spreading themselves all over the world.
One day, the people of Hinomoto which is a Far Eastern island country were to build forts called "stations" (eki) in order to counter the threat of the Corpses. By shutting themselves up they somehow manage to survive. The only way to enter or leave a station is by using an armored steam locomotive (aka Hayajiro). Each stations somehow kept life by lending their product.
In the station Aragane there's a boy named Ikoma who's living by manufacturing steam engines. While he was developing his own weapon called the "Piercing Gun Barrel" with the intention of defeating the Corpses, he was looking forward to the day when he can show his skills to the world.
So they're zombie Oni.
