GENJITSUSHUGISHA NO OUKOKU SAIKENKI - RAW
In a world where the Demon King had taken over a fifth of the land. Souma Kazuya (Soma) was summoned to that world as a hero, but the king took a liking to his rich country strong army proposal and somehow handed him the throne. Soma, who had the throne forced upon him, forewent adventure, and together with the talented companions he gathered, went about his nation-building with his realism.
現実主義勇者の王国再建記, 現実主義者の王国改造記～内政マシマシ、旅も入れてください～, A Realist Heros Kingdom Reconstruction Chronicle, Genjitsu Shugi Yuusha no Oukoku Saikenki, How a Realist Hero Rebuilt the Kingdom