
Koi ni Itaru Yamai is a Japanese novel of 124,331 characters, with 6,339 unique words and 1,683 different kanji. Its difficulty rating on Jiten is hard, 3.0 out of 5. The full vocabulary list ranks all 6,339 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.