Impressive Isekai/Brilliant Kingdom Building

When Kazura was investigating the place that would become his shelter, he stumbled on a certain room where it was possible to go into and back from another world.

🔅Intriguing plot, especially since MC seems to keep bringing the convenience of the 21st century and war seems close. Waiting to see what happens

focuses on agriculture and development

“Hero!” With that cliched line, Kazuya Souma found himself summoned to another world and his adventure—did not begin. After he presents his plan to strengthen the country economically and militarily, the king cedes the throne to him and Souma finds himself saddled with ruling the nation!

🔅pretty good plot, has romance, weak MC
kingdom building

An unknown parcel arrives to Yoshio, a 30-year old NEET. The content is a game disk titled “The Village of Fate.”, a beautiful CG game with real-life images. All of the villagers in the game are high-performing AIs, who behave remarkably close to human beings. In the game Yoshio takes the role as the god of destiny and is in a position to guide the villagers.

🔆Very interesting! And surprisingly well thought-out plot. I recommend to check it out.

A young pharmacologist and researcher in Japan died from overworking, and was reincarnated in a Medieval Parallel Europe. Thus the boy pharmacist will cheat by using his previous knowledge to create innovative medicines while helping the people of the parallel world, a story about living his new life to the fullest this time.

🔅Has actual medical knowledge and uses it to help people. OP MC
focuses on medicine

A protagonist reborn in another world. Apparently he had been reincarnated as an abandoned child. Before his eyes were abandoned children like him. This is the epic tale of the man who would later be known as the Divine Emperor.

One of the less stellar manga in this list (but its kingdom building so oh well). Started from the bottom now we’re here” type of vibe. Has romance. Somewhat OP mc

A male engineer transmigrated into another world, and became a prince. This place strikingly resembles the Middle Ages of Europe, but at the same time, it seems kind of different?

🔆it already has high ratings on its LN, and it truly does have an interesting plot that makes you want to read and know more

Although she had reincarnated as a the daughter of a Duke's house, by the time she regained her memories, the Ending was already here. "After he cancels my engagement, the story would have me confined to a church. Where can I find my happy ending?"

🔆Big brain manga; truly focusing on administration and matters of the state to the point where people might find it boring. There’s romance too. If you want action and fight scenes, this is not for you.

Minami Satoru who lived a normal life was stabbed by a passing ruffian, closing the curtains of the 37 years of his life—It should have been like this, at least. But he suddenly found himself not being able to see nor hear! In this kind of state, he became aware of the truth: he had reincarnated into a slime.

🔆An enjoyable read with enough comedy and plot, also adapted into anime (but the anime belittles the overall serious theme of the manga so i was disappointed)

"There's a little girl on the foremost lines of war. With blond hair, blue eyes and porcelain white skin, this little girl mercilessly terrorizes the enemy from high above in the sky. The name of this girl is Tanya Degurechaff, and she commands the army with a cute girlish lisp. But in reality, she is one of Japan's most elite salarymen, reborn as a little girl thanks to the whims of God.”

🔆beautifully chaotic and harsh

🔅Has the same vibe as Yojou senki; war-torn world reminiscent of the early contemporary history era (includes both world wars). Big brain manga.