Japanese Language Proficiency test (JLPT)

The Japanese-Language Proficiency Test (日本語能力試験, Nihongo Nōryoku Shiken), or JLPT, is a most valid and standardized criterion-referenced test to evaluate and certify Japanese Language proficiency for non-native speakers, covering language knowledge, reading ability, and listening ability.The test is held twice a year .(on the first Sunday of July and December). 

The JLPT has five levels: N1, N2, N3, N4 and N5. The easiest level is N5 and the most difficult level is N1.

follow the link below to find the details and test details

https://www.jlpt.jp/e/guideline/testsections.html

NAT-Test

The Japanese Language NAT-TEST is also an examination that measures the Japanese language ability of students who are not native Japanese speakers. The tests are separated by difficulty (five levels) with difficulty level increasing from NAT-5 to NAT-1. General ability is measured in three categories: Grammar/Vocabulary, Listening and Reading Comprehension. The format of the exam and the types of questions are equivalent to those that appear on the Japanese Language Ability Test (JLPT).

For more details follow the link below:

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

Japanese language capability test (JLCT)

This test is also conducted to measure the Japanese language communication skill of a non-native Japanese speaker and has 5 levels; JCT1, JCT2, JCT3, JCT4, JCT5.Further JLCT checks Japanese-language communication skill by dividing the test in similar order of Japanese characters, vocabulary, grammar, reading and speaking test.

For more details and test date follow the link below; 

https://jlct.jp/test_schedule.html