Bakumatsu Seishun Graffiti: Ronin Sakamoto Ryouma is a Japanese movie of 16,087 characters, with 1,721 unique words and 732 different kanji. Its difficulty rating on Jiten is expert, 4.3 out of 5. The full vocabulary list ranks all 1,721 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.