Even without the illegal PDF, you can ace the N4. Here’s a 3-month study plan using free/low-cost materials.
Gakushudo (がくしゅうどう) is a series of JLPT preparation books designed specifically for self-learners. Unlike some Japanese textbooks that assume a classroom setting, Gakushudo is written in clear, simple language—often with explanations in English and Indonesian. download buku gakushudo n4 pdf free
The N4 book in the Gakushudo series focuses on: Even without the illegal PDF, you can ace the N4
Many Japanese language schools (like the Japan Foundation or local "Bahasa Jepang" communities) have Gakushudo in their library. Scan the pages you need for personal use. Even without the illegal PDF