What is the difference between JPT and JLPT?
The JPT is a test to measure the level of your Japanese communication. The test is not a pass or fail system, but rather a score between 10 to 990. For this reason, the JPT provides an accurate comparison of abilities that cannot be expressed as a pass or fail. In addition, the JPT is held every month, so there are many opportunities to take the test and the results are announced two weeks after.
On the other hand, the JLPT is divided into five levels from N1 to N5, and its results will shows you a pass or fail for each level. The test is held twice a year, in July and December, and it takes two months to announce the results.