The Reformation of the World as Overseen by a Realist Demon King

Astaroth has been reincarnated into a strange new land as the seventy-second Demon King with a mission from a mysterious goddess to unite the world under his banner and reform its chaotic ways. With two demon lords now crushed beneath his heel, Astaroth's power is only increasing, but he's got no time to rest on his laurels. In search of a means to bolster his army even further, he heads to an abandoned ruin, where he comes across a mysterious boy…

Now that Astaroth has already taken down the Demon Kings Sabnac and Eligos with the help of Eve, Hijikata Toshizou, and Jeanne d’Arc, he’s set his sights on the star-shaped Demon King Decarabia. But even though Astaroth’s plan to turn Decarabia’s greed against him worked beautifully, the rival Demon King has a trick up his own sleeve. And when Decarabia’s castle does fall into Astaroth’s hands, he’ll need someone capable to run it…perhaps even one of the greatest strategists of all time!

With Eve, Toshizou, and Jeanne by his side, brand-new Demon King Astaroth has already bested three other demon kings on his way to mastering and reforming the world. His next target is Zagan, a monstrous demon king with a powerful hero on his side—the son of Genghis Khan!

After successfully taking down the fourth demon king to stand against him, Astaroth sets out with Eve and Jeanne in search of coffee beans. But his leisurely trip turns into a harrowing subterranean quest when he meets Ryoma, a half-elf girl who begs him to help save her father—the famous samurai Sakamoto Ryouma!