
Dias finally returns home after decades of war. He's hailed as a hero and promptly rewarded with his own domain...which turns out to be little more than empty plains. Population: zero. Dias, who has only ever known battle, finds himself at a loss. How is he supposed to survive, let alone cultivate his territory into a thriving, prosperous dominion when there's nothing but grass as far as can see? Fortunately for Dias, a horned girl by the name of Alna is about to show him there's more to the plains than meets the eye! (Source: J-Novel Club)
Ryoumin 0-Nin Start no Henkyou Ryoushu-sama is a Japanese novel of 1,185,282 characters, with 18,810 unique words and 2,332 different kanji. Its difficulty rating on Jiten is hard, 3.5 out of 5. The full vocabulary list ranks all 18,810 words by how often they appear, and you can study them on Jiten or download them as an Anki deck.
Here are some of the words that appear most often in this media, as well as a sample of its rarer vocabulary.