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3000 Essential Vocabulary for the JLPT N1 is a vocabulary resource by ASK to prepare for the JLPT N1. Included in this book is vocabulary found commonly on the JLPT and often used in daily life. In the book you will find several sections with each section focusing on a specific topic. The structure is consistent throughout the whole book, so it is easy to get used to it.
Also comes with free Audio files and practice tests, available via the publisher's website.