The Japan Kanji Aptitude Test (日本漢字能力検定) tests one's knowledge of kanji. The test is more commonly known as the Kanji Kentei (漢字検定), or the shorter Kanken (漢検). There are 12 levels (levels 10 through 3, pre-2, 2, pre-1 and 1) with level 10 being the easiest and level 1 the most difficult.