If you're looking for manga similar to Flame Oukoku Koubouki (Light Novel), you might like these titles.
Amagi Shigehisa, who was taking his university entrance exams, suddenly transferred into a world where swords, bows, and magic flutter about without any warning. As the strongest race, Dragunir. Who and for what purpose? Without harboring this question for long, Shigehisa confronts an excessively heartless and harsh reality. He transferred into the North Tenshia Continent. There, with the exception of humans, the Beast people experience extreme discrimination and oppression, and are forced into a life-threatening lifestyle every day. Thus, Shigehisa made a decision. “By my own means, I will make a kingdom for the sake of fluffiness!” Because of a man who possesses a lifespan and power unmatched by humans, a battle which involves the whole continent starts.
A clumsy princess and cool adventurer collect materials for their new country!
A protagonist reborn in another world. Apparently he had been reincarnated as an abandoned child. Before his eyes were abandoned children like him. In order to survive, he led them into farming. Little by little, orphans gathered, and upon hearing rumors of a village, others began to migrate. The group that had been nothing but children had become a village before anyone realized. And then various countries in the surroundings started to have an eye on it…
Adventurer Kaito, in a stroke of misfortune, fell to his death due to the accident in the dungeon causing the crust to split and diverge. However to his luck, the place where he fell was a resting location of a Titanic Ship from the age of gods. Kaito who was left with only a soul, fused with the titanic ship in a form of a whale, gained an immense power strong enough to destroy even a country in instant.
I was summoned to a ruined world and received the ability to create various things. Since I don’t have a house to live in I will make a house. Since people are gathering at my house I will make a town. Since the town is being attacked by monsters I will make the strongest weapon and repel them. Using my infinitely charging magic power I will remake this world as I please.
One day, a train accident occurred in the morning. It was the start of everything. The people who were riding on it were invited into a white space. What awaited them there was an old man who claimed to be god. The old man said: "I will transfer you to a different world. I will give you a power to help you survive." Several hundreds of cards facing down appeared in the mid air. What Fujiwara Nobuhide, a trivial temporary employee drew, was [The ability to make a town]. This is story of a certain man who has the ability to make a town in a different world. At first, it started as something like Edo from the Tokugawa Period. However, my goal is a modern city. I’ll do my best!
Renjin Yanase is an ordinary member of society whose occupation is a sales person. His hobby is an online VR game "Einherjar" that has been on for over five years now. It is a game with high degree of freedom and Renjin silently works hard to nurture his subordinate character. The next day, Renjin falls asleep in the game. He felt like someone was calling his name so he woke up. Standing in front of the half-asleep Renjin was Eleanor, a character he created. When Renjin looked outside after being puzzled to the characters who behave like they are alive, the outside scenery changed into one that he did not know at all. Renjin who surveyed the surrounding, realized that the castle and the 200 subordinates that he created with time and money was transferred to a different world...
Iris Almeria, the daughter of a powerful duke, is arrested and forced to her knees in front of her fiancée. Her betrothed, Prince Edward, is rejecting her for another woman! As Iris's life flashes before her eyes, she suddenly realizes she knows exactly what is coming next–because she has been reincarnated into her favorite otome game as its villainess. Quick thinking saves her from exile, but Iris can't rest yet. If she wants to survive this world that sees her as wicked, she'll have to change the world itself.
Kiryu Shouma, an employee of Arasa Company, resigned from his job. He was thinking where he should go next, but found himself in a different world after walking out the company doors. It was a world with monsters rampaging around, yet the goddess who summoned him didn’t gove him a single skill. In fact, he already has the power and skill needed to overwhelm the people that summoned him. That is because during his “Chuunibyou Phase”, he obtained a skill called “The Overlord of Variant”. He wasn’t able to use it in his former world but can in this wold. Thus, by using the power he obtained, the journey to build a country in the new world has begun.
A merchant by the name of Okuda Keigo put everything into his work, day and night, until one day he won a lottery of 1 billion yen! With his money worries solved for life, he moved to the countryside far away from civilization to live the slow life. Then, suddenly he was transported to another world, along with his chicken coop?! In a world where he’s unable to communicate with others, you think his merchant skills will help him?! A man in his forties who hates people retired to another world. The story of his slow life has begun!