Shin Kanzen Master N1 Wordbook covers 2,200 words plus 638 reference words, organised by part of speech and topic: society, economics, body and health, nature and science, among others. Every word comes with an example sentence, and every 200 words a reading passage lets you see them in real context. Related compound and derived words are grouped together. The book also covers prefixes, suffixes, counters, honorifics, and greetings. A free companion app provides audio for all words and reading passages. Comes with English, Chinese, and Vietnamese translations and a red overlay sheet for self-testing.
Shin Kanzen Master was designed to build learning into each book alongside the test prep. Vocabulary is harder to do that with, and the Wordbook sub-series seems to be 3A's answer: split it into two books, one for learning and one for testing. This is the learning side. The format is more than a word list. You learn a word, see how it's used in a sentence, then meet it again in a reading passage. If you're using the Vocabulary (語彙) drill book, this pairs with it. It also works on its own if you prefer working through words on a page over flashcard apps like Anki.
At N1, a lot of vocabulary is rare enough that you won't encounter it reliably even in native reading. The topic-based grouping helps here. Learning words in clusters by subject builds connections that make them easier to retain.
