Fushi No Kami has been compared to Bookworm, but I think it stands apart from it enough (and reminds me of other series, like The Economics of Prophecy with the bee business portion, the village focus of Cooking With Wild Game, and Realist Hero at times with the civilization management and goods processing). It follows a young 8-9 year old named Ash who has been living in a harsh Dark Ages type village where sickness, starvation, and poverty are only a few mistakes away. He wants to make life easier for himself, but to do so he'll ostensibly have to make it easy for the village too, so everybody wins. Books are his toolset, and the plot just so happens to conveniently have a past civilization that took great care to write down instructions on aspects of farming, botany, and other necessities of life that Ash can use as an easy guide if he learns to read.
The main character stands out almost immediately for his sass and wit. Ash could be described as a brat and know it all. He's a schemer who manipulates folks into doing what he wants. Luckily, what he wants just happens to be the best thing for the villagers, and so everyone prospers with his decisions so far, so it doesn't feel mean spirited. He is only 9 even if he's lived a past life, so I can forgive most of the childish mean spirited things he says or thinks, particularly when it comes to Father Folke or his dad (although... Feeding his dad experimental tranquilizer by pouring it into his beer because "screw those drunk people" was definitely a low point).
There is a very healthy cast of characters in this. Chief among them is probably Lady Maika, the village chief's daughter who becomes smitten with Ash after witnessing his most genuine smile when he exits the church carrying a precious book for the first time. Maika's mom is a lot of fun because she's actively trying to help her daughter "get her man". She also wears the pants in her family despite her husband being village chief, and acts as the secret leader that works deals with Ash to allow the village to prosper on his intelligent ventures without drawing too much attention to his profit. Ash's parents on the other hand don't get too much play, especially his mom. You get more of his jerkish old man who likes to spend time drinking, and while drunk cusses out his son for doing "unmanly" work like teaching others to read. Even the "jerk" characters so far have redeemed themselves or headed in good directions, so there's a lot of good vibes in it overall. Ash also acts as a surprisingly good teacher to villagers whom he befriends, including Tanya the beekeeper, Tanya's little bro, and Maika, and it's nice to see intellectual pursuits be encouraged (feels very J-Novel to me in that smart characters are rewarded and we can root for these nerds to study and fall in love).
There's definitely some room for criticism with this one. For one, the lead is Isekai'd, but I may have forgotten or missed who he was in the real world that he came from. His being Isekai'd seems really not as significant as it could be in terms of his knowledge, it's more his temperament that is affected by it (he uses more proper language and has a smarter attitude than other kids his age and even adults). Most of the time his "skill" is just being able to read, and the illiteracy of the village helps him stand out for now. He does start some business ventures and some herbalist stuff, but even a lot of that is just him learning from a botanical record, nothing too standout. Ash keeps his being reincarnated a secret because it "could cause problems", but I hope he lets at least someone like Maika or Father Folke know at some point.
The stupidity of the culture is also something I think folks will find insulting and unbelievable too. There are records in the church and in people's own houses that store vital information on subjects that could help keep the village from failing, and yet there's a bullheadedness that their oral tradition and farming knowledge is more than enough to stay afloat. You just wonder how they could just lose the written language so easily when the documents are there. I think folks will find it hard to believe how Father Folke (and seemingly hundreds of years of scholars) could just ignore the possibility that the 2K year old book's written characters could be pictograms or whatever, while a 9 year old Ash figured it out.
Overall, pretty pleased with the bit I read. I didn't quite finish the final prepub part, but I'll probably just keep going on to volume 2. The tagline "rebuilding civilization" is what will probably intrigue most to continue with this one. It's hinted at that this world was once prosperous enough to potentially have printing press technology, and Ash is likely going to work with Father Folke to uncover that mystery. I also want to see how the Ash x Maika plot plays out, and whether Father Folke might find his own happiness with someone eventually.