The creators of the exam publish official workbooks that contain questions compiled from prior years. These are the closest legal representations of a real N1 exam.
While not "previous papers" per se, these books use the same style and difficulty level as actual past exams and are highly recommended for N1 prep. Summary Checklist for N1 Success jlpt n1 previous question papers top
: Print out official JLPT bubble sheets to practice filling them out quickly. The creators of the exam publish official workbooks
It is crucial to note that the JLPT administrating bodies every year. This differs from exams like the EJU. However, resources are available through the following avenues: Summary Checklist for N1 Success : Print out
Finding authentic materials requires knowing where to look. Here are the top official and reputable sources for past test materials. Official JLPT Sample Workbooks