The Nihongo Noryoku Shiken (Japanese Language Proficiency Test / 日本語能力試験・にほんごのうりょくしけん)is given every July and December. This test is used to determine one's proficiency in the Japanese language according to 5 levels - N1 being the most difficult to N5 being the lowest. In addition to providing locations and dates of the exam, the website also includes sample questions and lists suggested books for practice.