
Kangoku Gakkou nite Monban wo is a Japanese novel of 398,057 characters, with 11,987 unique words and 2,046 different kanji. Its difficulty rating on Jiten is hard, 3.6 out of 5. The full vocabulary list ranks all 11,987 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.