Sakuragi Sakura

One day, Yuzuru Takasegawa — a first-year high school student — is urged by his grandfather to go on an arranged marriage meeting, insisting that he wants to see his great-grandson before he dies. However, not wanting to bear the weight of a fiancee at the tender age of a freshman in high school, Yuzuru tries to avoid the arranged marriage meeting by imposing an irrational condition that, “If she is Blonde Haired, Blue Eyed, Fair Skinned with big boobs, only then I will think about the marriage”. But somehow, he finds the girl who meets the conditions that Yuzuru has put out, and he reluctantly ends up going to matchmaking only once. And on the day of matchmaking, it was Arisa Yukishiro, a beautiful girl with reputation at school, shows up on the scene. \[adapted from Novel Updates]

Possessing memories of being born, raised, and died in a country called Japan… the young boy Hercule was born in the imperial household of a declining empire. This empire that once was a superpower that reigned over the world… is now a country nearing its end. The public finances are on bankruptcy, the military strength declined to the point that barbarians are able to wreak havoc on their territories and the neighboring countries squeezed the Empire for tribute payments every year. And the young Hercule is forced to take over this empire! Thus, the 12-year-old Hercule ascends to the throne. Using the knowledge from his previous life, Hercule struggles to rebuild the empire… reforming the tax system, revolutionizing the industry, reorganizing the public finances, rebuilding the administration, and reforming the military system. This will later be known as the story of the young emperor who restored the Lemurian empire, which would later carve its name in history as the great monarch of the three continents, the "Divine Light Emperor" Hercule the First. Link: Original Web Novel - Kakuyomu

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. Then various countries in the surroundings started to have an eye on it.