Shout-Out: Yamada Monogatari by Richard Parks

In an ancient Japan where the incursions of gods, ghosts, and demons into the living world is an everyday event, an impoverished nobleman named Yamada no Goji makes his living as a demon hunter for hire. With the occasional assistance of the reprobate exorcist Kenji, whatever the difficulty - ogres, demons, fox-spirits - for a price Yamada will do what needs to be done, even and especially if the solution to the problem isn't as simple as the edge of a sword. Yet, no matter how many monsters he has to face, or how powerful and terrible they may be, the demons Yamada fears the most are his own!

Yamada no Goji is a minor nobleman of ancient Japan who has lost everything - except a single purpose: keep a promise to the woman he loved. In order to fulfill his vow, all he has to do is fight a horde of demons and monsters, bargain with a few ghosts, outwit the sinister schemers of the emperor's court, find a way to defeat an assassin who cannot be seen, heard, or touched - and change the course of history. Fortunately, Yamada specializes in achieving the seemingly impossible, so he is sure in some way to succeed...if he doesn't drink himself into oblivion first.