The N4 level is part of the Japanese Language Proficiency Test (JLPT) levels, which range from N5 (beginner) to N1 (advanced). The N4 level is considered intermediate and requires a significant understanding of the Japanese language, including its grammar, vocabulary, reading, and listening skills.
: You can often find grammar summaries here, such as this Tata Bahasa N4 (N4 Grammar) guide. download buku gakushudo n4 pdf free