Gekkou Kamen: Zekkai no Shito is a Japanese movie of 6,090 characters, with 852 unique words and 472 different kanji. Its difficulty rating on Jiten is hard, 3.6 out of 5. The full vocabulary list ranks all 852 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.