Demon slayer

This is Japan 1906, people live a normal life. But in reality, there are "demons" walking around. Demons can look like people or look like monsters. They eat people. They can't go out in the sun (they'll burn). The player is in a secret organization called "demon slayer corps" they are engaged in the extermination of demons. they're using katanas. They're using the "breathing styles" so they can become almost as strong as demons. There are "water breathing" "flame breathing" "wind breathing" "stone breathing". Sometimes there are exceptions, such as "flower breathing" or "serpent breathing" which are reworked copies of one of the main four