To maintain the relevancy of this international certification, the Japan Foundation updates the exam pattern from time to time. Formerly, this examination had four levels:- N1, N2, N3, N4.
A new level N5 was added in 2010 to make the distribution of syllabus more accurate and appropriate. The current level of N4 and N5 corresponds to the old level of 3 and 4 respectively. The current N3 level bridges the gap between the old 2 and 3 levels.