
Sekai Seifuku-kei Imouto is a Japanese novel of 254,530 characters, with 11,638 unique words and 2,023 different kanji. Its difficulty rating on Jiten is average, 2.8 out of 5. The full vocabulary list ranks all 11,638 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.