
Four years have passed since the Demon Lord was defeated. The kingdom, now at peace, has undertaken the task of compiling the many great deeds of the fallen Hero, interviewing the members of his former party: Leon the Sword Saint, Maria the Holy Maiden, and Solon the Sage. Yet in between their tales of the Hero's past and their adventures together, the truth about his death slowly comes to light. Who killed the Hero? The Demon Lord? ... Or his comrades? (Source: Yen Press)
Dare ga Yuusha wo Koroshita ka is a Japanese novel of 98,602 characters, with 5,045 unique words and 1,470 different kanji. Its difficulty rating on Jiten is average, 3.0 out of 5. The full vocabulary list ranks all 5,045 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.