On the surface, Fushi no Kami is your standard ‘person with knowledge of advanced tech finds themselves in a low tech world’ type of story.
As it progresses however it turns out it’s not quite that simple. For one thing, rather than from modern-day Earth, the protagonist appears to have been reincarnated from an advanced nanomachine using society. For another this isn’t a generic fantasy world, but rather a post-apocalyptic one with mostly exhausted natural resources (no fossil fuels, metals and even stone are relatively rare). It’s also not quite a pure kingdom building story, as there’s both a significant romance subtheme and a re-occurring plotline hinting that there’s far more to the protagonist than mere memories from a past life.
Character-wise it also shakes things up a bit by having neither of the two romantic leads fit into a particular gender stereotype: Maika has the attributes of both a cute girl being cute and a hardened, bloodthirsty swordsmaster. Ash the traits of both a charismatic leader of men and somewhat ditzy airhead when it comes to interpersonal relations. The dynamic works shockingly well and even extends to the various side characters who get paired up over time.
So I’ll definitely be continuing to follow this series to see whether or not the author can stick the landing.