This is because in some cases, you will need to pass the N5 test for admission to Japanese language schools and to apply for a student visa.
One of the main reasons why students choose to take the N5 or N4 is to study in Japan. At the N4 level, learners are able to read and understand passages on daily topics, and are able to listen and comprehend daily conversations and generally follow along when spoken slowly. They are also able to listen to and comprehend everyday conversations and are able to pick up information in short, slowly-spoken conversations. Those who pass the N5 level are able to read and understand typical expressions and sentences written in hiragana, katakana, and basic kanji. JLPT N5 is the lowest JLPT level, followed by N4.