Sword of the Demon Hunter: Kijin Gentosho (Light Novel) Vol. 4

AN UNLIKELY PACT It is year two of the Bunkyu era. Six years have passed since the alcohol craze that stole yet more loved ones from Jinya’s life, but as time marches forward, so must he.
The new era keeps Edo on edge as the anti-shogunate movement gains momentum with each passing day. Meanwhile, Jinya investigates rumors of a demonic sword and meets Hatakeyama Yasuhide—a samurai who serves the feudal lord of Aizu and has sworn loyalty to the shogunate. But just how far will this samurai go to prevent the shogunate from becoming just another relic of the past?
Series Overview: For generations, a shrine has stood in the mountain village of Kadono, and for each generation the shrine has had an Itsukihime—its shrine maiden—and the maiden has had her guardian. During the Edo period, a young man named Jinta protects the town and the Itsukihime. When he confronts a strange demon in the nearby forest, it tells him that in the distant future a Demon God will threaten all people, everywhere, and it claims that the the Demon God’s rise to power springs from this very time and place, in the village of Kadono. So begins the centuries-spanning journey of a man tainted by demons, hunting through time to seek justice for what he’s lost, and to find a reason to keep on fighting.