Graders assess how your answers are equal to or above the minimum score required to pass (30%). The grades are based on an Item Response Theory, which involves comparing patterns of the responses of test-takers to how a native Japanese language speaker would respond.
How is JLPT scored and graded? JLPT is scored on a pass/fail basis. If you are getting ready to take the exam, the following is a complete guide on how the test is scored and graded, so you know what to expect. It takes years of study, and learning how the test is scored and graded will help you to pass with flying colors. Learning Japanese is hard enough, but passing the JLPT or Japanese Language Proficiency Test is no joke.