Resource: Japanese Language Proficiency Test

The Japanese Language Proficiency Test is the most well-known test of Japanese proficiency for non-native speakers. There are five test levels (N5, the lowest, to N1, the highest). Once students have a basic understanding of Japanese, it can be very rewarding for them to take a test like this to prove their level of proficiency.

Link: Official Site

Link: Sample Questions

Link: Books on Amazon.co.jp