
Three years ago, a gateway between Earth and the Beyond opened over the city of New York. In one terrible night, New York was destroyed and rebuilt, trapping New Yorkers and extra-dimensional creatures alike in an unassailable island, a world all its own hidden in the mist of its physics-defying waterfalls. New York has been rechristened Jerusalem's Lot, a paranormal melting pot where magic and madness dwell alongside the mundane, where every form of human vermin gathers to exploit otherworldly assets for earthly profit. Now someone is threatening to breach the controlled flow of unharmful, average humans and items in and (much more rarely) out of the city and thereby release Jerusalem's Lot's deluge of horrors on The Outside. The mysterious super-agents of Libra fight the impossible to prevent the unthinkable. (Source: Dark Horse) Note: Includes the one-shot "Kekkai Sensen: Mafuugai Kessha".
Kekkai Sensen is a Japanese manga of 122,555 characters, with 9,697 unique words and 1,886 different kanji. Its difficulty rating on Jiten is hard, 3.7 out of 5. The full vocabulary list ranks all 9,697 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.