NAT

NAT-TEST is the Japanese language proficiency test which measures the Japanese language ability of the students who doesn’t possess the native Japanese speaking capability. The test is considered by five difficulty levels i.e. N5 basic level to N1-Advanced level. And the general ability is measured in three categories: Grammar/ Vocabulary, Listening and Reading Comprehension.

NAT: http://www.nat-test.com/en/about.html

JLPT

JLPT which stands for Japanese Language Proficiency Test is a standardized criterion-referenced test to evaluate and certify Japanese language proficiency for non-native speakers, covering language knowledge, reading ability, and listening ability. Basically, the test is taken twice a year i.e. July and December.

JLPT: http://www.jlpt.jp/e/index.html