How A Realist Hero Rebuilt The Kingdom Vol. 1

After losing his only relative, Kazuya Soma is suddenly summoned to another world. He finds himself in the medieval-like Kingdom of Elfrieden and is viewed as a hero, even though he’s not very heroic. However, with his rational mind and knowledge of the modern world, he comes up with new policies for rebuilding the financial and political systems of the kingdom, which is on the verge of collapse. Due to his prowess, the king even gives up the throne to him! Now, together with the king’s daughter Liscia, the clever-minded Hakuya, a dark elf and superior warrior named Aisha, a glutton named Poncho, a diva named Juna, and a young girl named Tomoe who can speak with animals, he begins using his modern knowledge to revive the kingdom!
Notice: This book is written in Japanese.