Kijin Gentosho is a Manga/Manhwa/Manhua in (English/Raw) language, Action series, english chapters have been translated and you can read them here. You are reading Kijin Gentosho chapters on ManhwaZ, fastest updating comic site. The Summary is
The Edo Period was a time when humans still had dangerous encounters with demons who ran rampant throughout the land. In a remote village in the mountains known as Kadono, the traditional shrine maiden called “Itsukihime” would unfortunately be targeted by demons. Despite being an outsider, a young man known as Jinta is tasked with the duty of protecting the shrine maiden. One day, while hunting down a demon sighted in a nearby forest, he comes across a mysterious demon who claims to have seen into the far future — from the Edo Period all the way to the modern Heisei Era. Jinta ends up on a journey spanning across time, constantly forced to question what it means to wield a sword and what it means to be a demon and to be a human.